What is used as energy by most of the organisms on earth\nOptions:\n- (A) sugar\n- (B) heat\n- (C) food\n- (D) water\n- (E) Light\n- (F) Energy\n- (G) salt\n- (H) carbon
Let's think step by step below.
(A)
Glucose is used for energy by the cells of most organisms.

Blood Sugar Glucose is sugar.

Sugar is used for energy by the cells of most organisms.

.

So, the final answer is (A)