Which of these sentences contains an adverbial clause? he told me where i could get some coffee. what she pointed out is very significant in these times. i do not know how to invest my money. most animals thrive where they can find food easily. nextreset

I believe it would be the last one. "Most animals thrive where they can find food easily." Because it's telling us by which the animal finds its food.

 A clause can modify verbs, adverbs, and adjectives by telling us when, where, why, how, how much and under which condition. These sentences usually begin with such, as, after, because, and although.

Hope this helps. :)