The sun contributes what to ecosystems?\nOptions:\n- (A) sun spot\n- (B) energy\n- (C) darkness\n- (D) seeds\n- (E) positive\n- (F) photons\n- (G) Nutrients\n- (H) Energy.
Let's be accurate as possible and think first.
(B)
Energy enters ecosystems in the form of sunlight or chemical compounds.

If there is sun, there is sunlight, there is day.

Energy enters ecosystems from the sun.

.

So, the answer is (B)