In what ways do the agout and the brazil nut tree depend on each other?

By having a symbiotic association with each other.

Explanation:

In the Amazon rainforest, a small rodent is known as agouti and the Brazil nut tree are reliant upon each other. After getting ripened, the Brazil nut tree drops its pods, however, without the help of agouti's sharp teeth, the pods would not get split open. Agouti is the only animal found in the forest that possesses the tendency to split the pods. The agouti gets benefit by consuming the Brazil nuts, and in return, the agoutis bury and hide the extra nuts, and of these nuts, many of them take the form of a root and reload the stocks of Brazil nut trees again.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.