select the choice that best completes the following sentence.

simple machines,

a. are made up of multiple moving part.

b. reduce the amount of energy needed to do work.

c. cannot be combined to make compound machines.

d. are tools that make work easier.

Its B: reduce the amount of energy needed to do the work by putting the work onto something else

The answer is be because they do simplr jons for you and you dont have to worry about wasting energy on it

(mark me as brainliest)

f=ma newton

f=100x2.5=250n

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.