What is one way that historians can establish the authenticity of a primary source?

A historian can establish the authenticity of a primary source by questioning it.

Explanation:

There are several things that historians can question about a source, the first of all is, Was the source created at the same time of the event it describes?, then Who is the author or provider of this information?, Is the information logical an accurate according to the time period? Do other sources mention similar information or even the same information?

you didn't give any answers to choose from so i can't with this but, i do know something that the mexican government would be worried about and that is the wall that donald trump is currently trying to get up.

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.