Options are:
1). tiny
2). cellulose
3). photons
4). unique
5). messengers
6). chemicals
7). complex
8). similar
Given those answer options, answer the question: Fact 1: Chlorophyll is used for absorbing light energy by plants. Fact 2: Chlorophyll is a complex molecule. Given the two facts above, what sort of molecules are used for absorbing light energy by plants?
A:
7).