Question

a change in earths total insolation would be caused by______
a. sunspots
b. earths revolution
c. earths tilt
d. precession

Explanation:

Insolation refers to the solar radiation received on Earth. Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by intense magnetic activity. Changes in sunspot activity can affect the amount of solar radiation (insolation) reaching Earth. Earth's revolution, tilt, and precession affect the distribution of insolation over Earth's surface (e.g., seasons) but not the total amount of insolation.

Answer:

A. sunspots