Answer the following question, with explanation first.
All chemical reactions require a form of what to get started?\nOptions:\n- (A) oxygen\n- (B) celestial measurement\n- (C) gas\n- (D) heat\n- (E) UV\n- (F) charge\n- (G) Light\n- (H) scientific expression

(D)
All chemical reactions require activation energy to get started.

Basically, heat is energy.

All chemical reactions require heat to get started.

.

The answer is (D)