How do historians help us learn about the past ​

Teaching us important stuff about the pass, Like the civil war ETC.

Historians help us learn about the past by studying the past. They do extensive research on past events and then relate their discoveries to the public via museums or books.

Explanation:

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.

option a

explanation:

to cleberate the end of their war