Match each term with the phrase that best defines it

Sectionalism: Concern for one's region over concern for the entire nation.

Popular Sovereignty: the idea that people should be able to vote on important issues

States' Rights: the idea that states should hold the most political power

Nullify: to invalidate something or make it null and void.

Explanation:

the u.s. department of labor is a cabinet-level federal agency that supports the american labor force. it has three overall functions. first, it protects the rights of workers and retirees. second, it provides job training. third, it provides statistics related to working, prices, and income.

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.