In which of the following plants does the petiole expand, become green, and synthesize food?

In which plant does the petiole expand and become green to synthesize food?

Function of petiole is $:-$

The coloured part in Poinsettia $(Euphorbia)$ is

Leaves arising from an underground stem like a bulb are called radical leaves. The leaves that arise on the nodes of stem branches are called:

The leaf of a marigold is: