Answer:
Ultraviolet radiation does not influence photosynthesis
Assume as what happens in a pot of water as it get heats.. hot becomes less dense, rises and cools, becoming more dense then sinks- that's called CONVECTION
So D- is the right answer
Mercury, Venus, Earth, and Mars are all known as terrestrial planets I believe.
It's some change in the conditions around the organism, which the organism can detect and respond to. A change in temperature, more light, or something physically poking the organism are examples.
