difference between polysemy and homonymy?

hello .i am studying teaching language skills.if i have problems while studying my lesson  may ı ask you questions?

now i am studyig vocabulary.

my lesson titles are :

1words:1.1 wodr formation1.2multi word units

2lexical relation:2.1 collocation2.2sense relations2.3 semantic fields2.4 homonomy and polysemy

-metaphorical extensions 2.5 metaphor2.6 componential analysis

3mental lexicon 3.1input,storage,retrieval 3.2prototypes 3.4meaning and cognition

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i want you to give me advices ,tips about these subjects ,how can i study my lesson  to do my best in my exam

i am sorry if this is nonsense help

thanks friends

thanks mister micawber.

ok then, i will ask so much questions to you

and here is my 1st question: are there any differences between ortographic and phonological shape?

in my book it writes that' L2 learners may associate ortographic shape as phonological shape...

thanks

mister micawber ı thank to you too much. it's ok now.

please would you inform me with concretely(?) about mental lexicon concepts which are: input, storage and retrieval?

thank you

i am very happy to hear  you