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The diagrams depict the formation of sand dunes over the sandy ground.

Overall, a sand dune is a landform composed of wind-driven sand and formed due to the earth’s depositional forces.

In detail, sand particles are transported by the wind over the dry ground which has the capacity to rebound objects strongly. Hence, the sand moves in a bouncy fashion a little over the ground.

As the wind continues blowing, it carries sand particles to a wet, sticky area. There, any particles, having reached the ground, often adhere to it. When more sand particles are adhesive to the ground, a structure resembling a mound is formed – it is a sand deposit.

As it is made of sand-sized particles, the sand dune is not as rigorous as other structures which have the ability to deflect the wind. As a result, due to wind forces, sand particles from a dune are carried to another location to form other similar structures.

You did not post the key to the diagrams. The key is important to understanding it.

The diagrams depict the formation of sand dunes over the sandy ground.

Overall, a sand dune is a landform created by winds carrying sand grains composed of wind-driven sand over certain terrains. and formed due to the earth’s depositional forces.

In detail, sand particles are transported by the wind over the dry ground which has the capacity to rebound objects strongly. Hence, the sand moves in a bouncy fashion a little over the ground.

As the wind continues blowing, it carries sand particles to a wet, sticky area. There, any particles, having reached the ground, often adhere to it. When more sand particles are adhesive to the ground, a structure resembling a mound is formed – it is a sand deposit.

As it is made of sand-sized particles, the sand dune is not as rigorous as other structures which have the ability to deflect the wind. As a result, due to wind forces, sand particles from a dune are carried to another location to form other similar structures.

It is not a good piece of writing. You never mention the three different diagrams and what each one shows. The writing is somewhat awkward. I have added a sample essay for you to learn from.

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The three diagrams illustrate how sand dunes are formed.

Overall, sand dunes are formed under very limited conditions. A strong wind, a terrain with areas of wet and dry sand, and a source of loose sand is required.

The first diagram shows that even if there is a strong steady wind and a source of loose sand, dunes do not form. That is because the blown sand particles will just bounce off the dry soil, and be carried off by the wind. The second diagram shows the circumstances conducive to dune formation. The same factors as before are present, but there are some patches where the sandy soil is wet. Some grains carried by the wind do not rebound from these places, but adhere and accumulate to form a hump. It grows as more grains stick to the sides. The dune is shaped by the wind, with the steeper slope on the side opposite the wind direction. The third diagram shows another property of dunes, and that is drift, or the slow creep of dunes over the ground as if pushed by the wind.