Paragraph 1 of this passage with clues help you figure out the meaning of the word vital Changes this energy
Captured from the Sun
Chemical change called photosynthesis
Need them to survive

the correct answer is a

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

the solar system used to have much dust particles option no d