Insolation is a combination of the following words
a. instrumental solar insulation
b. incident solar radiation
c. intricate solar variation
d. involved solar saturation

Incident solar radiation.

Explanation:

Isolation is defined as the solar radiation that reaches surface of the earth. Isolation term is derived from the word solar radiation. It is mainly applied to radiation which is first arriving earth atmosphere, and then second arriving earth surface.

Isolation is measured by the amount of incoming solar energy received by the earth per square centimeter per minute. Isolation affects some factors such as temperature, the more the isolation cause higher the temperature.

false

explanation: