Question

which of these is an example of passive (no moving parts required) solar energy used to heat homes? power plants large south facing windows wind turbines hydro dams

Explanation:

Passive solar energy systems do not require mechanical or electrical devices (no moving parts). Large south - facing windows allow sunlight to enter a home and heat the interior through the greenhouse effect (sunlight enters, heats objects inside, and the heat is retained). Power plants (solar power plants may have active components like pumps for heat transfer fluids in some cases), wind turbines (have moving blades), and hydro dams (have moving turbines) are not passive solar for heating homes.

Answer:

large south facing windows