Hypothesis is what you think will happen before the experiment, it isn't necessarily backed up by any sources or evidence. A scientific law is the observation of a phenomenon and a theory is the explanation both can be used together to back each other up.
<span>a. They have homologous structures because they have a common ancestor.
</span>
C
Because if you look at the last stage the crust of the earth is a solid so it has to be c