Plants take carbon dioxide from the atmosphere mainly through their:
leaves
The correct option is D.
Explanation of correct option:
Plants take in carbon dioxide through the small pores present on the surface of leaves which are known as stomata.
Explanation of incorrect option:
Option A:
Roots absorb water and minerals from the soil.
Option B:
A stem is the portion of the plant above the ground.
Many flowers, fruits, and leaves grow on stem.
Option C:
Flowers are the reproductive part of the plant.
Flowers are available in different colors.
Final answer: Plants take carbon dioxide from the atmosphere mainly through their stomata.