Fact 1: Aplant requires photosynthesis to grow. Fact 2: Leaves are the main sites of photosynthesis. Given the two facts above, what does a plant need to grow?

Select from the following.
1). Glucose;
2). Echinoids;
3). Energy.;
4). leaves;
5). seeds;
6). nutrients;
7). energy;
8). sunlight;
Answer:
4).