Question

Guard cells:

contain chlorophyll
absorb light energy
control the size of stomata
split water into hydrogen and oxygen

Answer 1

contain chlorophyll
absorb light energy
control the size of stomata
split water into hydrogen and oxygen

Answer 2

The answer of this question is, guard cells are control the size of stomata.

Step-by-step explanation:

Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for opening and closing of stomata. Guard cells prevent an excess loss of water through respiration also.