Which is a characteristic of nuclear fusion?
produces radioactive waste
involves the collision of two nuclei
commonly used by humans as an energy source
requires very little activation energy

The collision of two nuclei.

The correct statement is it involves the collision of two nuclei.

Explanation:

There are 2 types of nuclear reactions:

1. Nuclear fission reactions: These reactions are defined as the reaction sin which a heavier nuclei splits into two or more lighter nuclei.

2. Nuclear fusion reactions: These reactions are defined as the reactions in which two lighter nuclei combines to form one heavier nuclei releasing a huge amount of energy.

From the given options, the correct statement is nuclear fusion reactions involves the collision of two nuclei.

its mg hope this