Which substance is a natural land resource used in construction? steel bedrock clay salt

B. Bedrock

Explanation:

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it