2 - Human refuse to stop polluting.
All other three are attempting to attack the problem of pollution.
Answer:
The yellow leaf was not exposed to the sun so it can't produce sugar.
Explanation:
The yellow region of the leaf didn't produce sugar because it wasn't exposed to sunlight. Part of the leaf was exposed to the sun, thus this leaf produced sugar, while the yellow part of the leaf did not because it was not exposed to the sunlight.
Answer:
The energy form originated by electromagnetic waves or fields.
A solution that maintains its ph within a narrow range is called a buffers.
Im not sure but im guessing its B)
