Kindly answer the e) one...

Dear student
e) Yes, plants are sensitive towards their environment. Plants can detect and respond to various stimulus like light, gravity, changes in temperature, chemicals, and even touch. They may also be drawn towards water, or away from bright light.
Example:
The bending of plants towards the sunlight is due to phototropism. The growth movement in plants in response to light stimulus is known as phototropism. For example, the flower head of a sunflower is positively phototropic as it moves from East to West, along with the movement of the Sun. Plant cells contain a hormone called auxin. This substance has a tendency to move away from the light. Auxins make the cells on the darker side grow faster than the cells on the lighted side.This causes the stems and the leaves to bend or lean towards the lighted side.  
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