Question

Onions are stem modifications of which of the following types? The chocies are the following: Tuber. . . . Bulb. . . . Corm.

Answer 1

I believe the answer is: Bulb
In bulb stem modifications, the plants will created some of protections to protect their main part of flesh from the effect of weathering. We can see this in how Onion that has a lot of layers to protect their main flesh from weathering and keep it dry