Question

What is the reason why plants tend to grow toward air with higher humidity? . .

phototropism.
geotropism.
hydrotropism.
thigmotropism

Answer 1

Answer - C Hydrotropism

Hydrotropism is defined as the growth of plants towards the atmosphere with higher moisture content. Since air with higher humidity has more moisture hence plants with positive hydrotropism tend to grow towards it.

Answer 2

The reason why plants tend to grow toward air with higher humidity is geotropism. The correct answer is B.  Geotropism allows the plants to orient themselves.