Which of these variables might affect the amount of solar energy reaching a particular place on Earth's surface?
A. latitude
B. tilt of Earth's axis
C. time of day
D. weather conditions, such as cloud cover

B. tilt of Earth's axis.

Explanation:

Solar radiation, or insolation, is the “fuel” of all solar energy systems. The performance of solar photovoltaic systems which generate electricity and solar thermal systems which produce hot water all depend on the availability and intensity of solar radiation.

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is