Here is a paragraph I'm working through, identifying adverbs:

"Except for barren and high mountain areas, food grows well. The Tlinget People had plenty to eat, so they were not nomads like many native tribes elsewhere. Also, the high mountain ranges isolated them."

1. Is "many" an adverb, since it's modifying "native" in "native tribes"?

2. Is "high" an adverb? It looks like "mountain' is an adjective describing both "areas" and "ranges", so "high" would be the adverb describing "mountain"?

I've been thinking about this to the point I've confused myself. Emotion: sad
1. No, "many" is a degree determinative. It's not modifying the adjective "native", but serves as a determiner in the noun phrase "native tribes". The presence of the adjective "native" in the middle of the phrase makes no difference. It's no different to "many tribes", "many long-extinct tribes", "many people", "many famous people", and so on. Traditionally, determinatives like "many" were called 'limiting adjectives', but in modern grammar they're called determinatives (or sometimes just determiners).

2. No, "high" is an adjective modifying the noun phrases "mountain areas" and "mountain ranges". Note that "mountain" is not an adjective, but a noun functioning as attributive modifier of the nouns "areas" and "ranges". It's a common mistake to think that nouns which modify other nouns suddenly switch to being adjectives. In fact they retain their status as nouns, but assume the function of 'modifier'.

Thank-you for your help!