Question

Why do leaves in a plant wilt?

• A. The roots do not have enough water to absorb from the soil.
• B. The humidity in the air is high.
• C. The level of $C{O}_2$ is less in the atmosphere.
• D. The atmospheric pressure is low.

Answer 1

The correct option is A

The roots do not have enough water to absorb from the soil.

Water is constantly moving in a plant from the soil, into the roots up through the stems and into the leaves. Plants wilt in most situations because they have run out of the available water. The humidity in the air, level of $C{O}_2$ and atmospheric pressure affect the rate of transpiration.