Fact 1: Carbon may be stored in sedimentary rock for millions of years. Fact 2: Carbon is an essential element for almost all plant and animal life. Given the two facts above, what does almost all plant and animal life depend on?

Choose your answer from:
(1). desert
(2). disease
(3). biological diversity
(4). Sedimentary rock
(5). absorb light energy
(6). sunlight
(7). ghosts
(8). Chlorophyll
Answer:
(4).