The locomorion is facilitated in an earthworm by a. segment b. satae
c muscle d. both a and b
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i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

i think it is true in my reasonment ..

by drinking easy

very easy

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

hope this !