Question

where is not much undergrowth in rainforest ​

Answer 1

It is because the big trees form a canopy which does not allow sunlight to reach down ,thus preventing the formation of undergrowth.

Answer 2

Answer:

Heyaa♡♡

Here is the answer :-

The main reason for not much undergrowth in rain forests is the penetration of sunlight is very much restricted by poor penetration of sunlight due to leaf canopy. ... Rain forests contain a large number of huge trees spreading their leaves which is termed as leaf canopy.

Hope it helped you.