HELPP asap I’ll mark you as brainlister :(

d.) circle motion requires a force to give it a centripetal acceleration.

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.

they are made of gases.

they have a spherical shape.

they make energy through fusion.