Which statement best explains why electricity should be conserved?
fossil fuels generate electricity and are limited in supply.
fossil fuels generate electricity and are expensive.
power plants use a lot of resources and never produce a lot of electricity.
power plants can use only one type of resource to produce electricity.

Fossil fuels generate electricity and are limited in supply.

The correct answer is "Fossil fuels generate electricity and are limited in supply".

Explanation:

Fossil fuel is obtained from the dead remains of the plants and animals buried under the land for billions of years ago.

The examples of fossil fuels are petroleum and coal. They are limited on the earth. They are non renewable as it takes billion of years to obtain the fossil fuel. The electricity is generated by using fossil fuels. If they are finished then they cannot be replaced immediately with an alternative source.

Therefore, electricity should be conserved because fossil fuels generate electricity and are limited in supply.

the pull of gravity on the rocket decreases

so here is the information for current research:

-nrel's geothermal analysts, scientists, and engineers perform a full range of research from developing advanced methods of locating and accessing geothermal resources to exploring innovative technologies to extract and produce clean energy from the heat of the earth

and here is the information for the technology of geothermal energy:

-it's clean and sustainable

-resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma

-almost everywhere, the shallow ground or upper 10 feet of the earth's surface maintains a nearly constant temperature between 50° and 60°f (10° and 16°c)

-geothermal heat pumps can tap into this resource to heat and cool buildings

-a geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building

-in the winter, the heat pump removes heat from the heat exchanger and pumps it into the indoor air delivery system

-in the summer, the process is reversed, and the heat pump moves heat from the indoor air into the heat exchanger

-the heat removed from the indoor air during the summer can also be used to provide a free source of hot water