#7- pls help me ill mark you brainliest and ill give you 5 stars <3

The answer is Synthesis

Explanation:

The two objects combine to make a bigger object

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.