An organelle found in most eukaryotic cells that transforms chemical energy into mechanical energy to
carry out life processes?

The organelle is mitochondria

Mitochondria

Explanation:

An organelle found in most eukaryotic cells that transforms chemical energy into mechanical energy to carry out life processes is the direct definition.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

the answer to your question is sperm