Critical Thinking Imagine you are Mary McLeod Bethune and write a
brief statement in which you state why
the teaching of African accomplish-
ments is important.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity