I think it's the first one and the third one. Not completely sure though.
Answer:
C. The byproducts of many medicines are responsible for polluting the Amazon River.
Explanation:
The force of gravity increases - when an objects mass increases.
Weight is - caused by gravity affecting mass.
Mass is - the amount of matter in an object.
The force of gravity decreases - when distance increases.
Answer:
Helium
Explanation:
The sun produces energy by fusing hydrogen atoms into helium atoms. This is a nuclear fusion that occurs at the suns core.
