It is bad to litter because that is harming the environment. When you throw out a can, it can harm a animal or several animals. Litter can also sink into the ground (I think) and harm the plants growing.
I dont see a photo? can you rewrite it
The answer is D. Food Threshold is the amount of food capable on feeding the organisms.
<h3>C.Green only</h3>
At low light levels, green leaves are most efficient at photosynthesis. But well yeah, in sunny days, red light will work the same as green light