In terrestrial habitats,how are temperature and rainfall conditions primarily influenced?

The correct sequence of the rate of photosynthesis in different light wavelengths is:

What damage occurs in plants due to water stress?

Assertion : The atmospheric concentration of $CO_2$ at which photosynthesis just compensates for respiration is referred to as $CO_2$ compensation point.
Reason : The $CO_2$ compensation point is reached when the amount of $CO_2$ uptake is less than that generated through respiration because the level of $CO_2$ in the atmosphere is more than that required for achieving $CO_2$ compensation point.

Which of the following would rarely be a limiting factor for photosynthesis?

How can plants be grown under limited water supply without compromising on metabolic activities?