Question

the image above is of the little river dam, which is also a hydroelectric power plant. what is one of the main advantages of using dams like the little river dam to produce energy?
they produce almost no pollution.
they have minimal impact on the environment.
the cost of building a hydroelectric power plant is low.
they can be built near most cities in virginia and throughout

Explanation:

Hydroelectric dams (like the Little River Dam) generate electricity by using the flow of water. Compared to fossil - fuel - based power generation, hydroelectric power produces almost no pollution (such as air pollutants from burning coal or natural gas). Dams do have significant environmental impacts (like altering river ecosystems, affecting fish migration), so the option "They have minimal impact on the environment" is incorrect. Building hydroelectric power plants is often very costly (requiring large - scale construction, infrastructure, and environmental mitigation measures), so "The cost of building a hydroelectric power plant is low" is wrong. Also, not all cities are near suitable water sources with the right topography for hydroelectric dams, so "They can be built near most cities..." is incorrect.

Answer:

A. They produce almost no pollution.