Question

because of the costs involved in maintaining high temperatures and pressure, nuclear ______ is not yet a practical method for generating electrical energy. which best completes the statement? fusion fission energy generators

Explanation:

Nuclear fusion requires high - temperature and high - pressure conditions, which are costly to maintain. Nuclear fission is already in practical use for electricity generation. Nuclear energy is a general term, and nuclear generators are devices. So, the context points to fusion as the one that is not yet practical due to cost factors.

Answer:

A. fusion