That would be C
I hope this helped you.
Answer:
Producing as many offsprings as possible so the chance of them living is higher.
Explanation:
There's a great picture that I attached below that is a great representation
Convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in the transfer of heat.