Which of the following are needed to have a fire? Group of answer choices

Heat

Combustion

Oxygen

Fuel

Heat, combustion, and oxygen

Explanation:

All of these things r needed to make a fire except fuel.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

answer///unconditioned stimulus;