Which is an example of the electromagnetic force?

A compass needle points north toward Earth’s magnetic pole.
An iron nail rolls off a table and falls to the ground.
The moon pulls on the water in Earth’s oceans, causing tides.
Protons that make up a nitrogen atom stay together in the nucleus.

a

Explanation:

The coordinate plane where the point is 1 unit to the left and 3.5 units down

Step-by-step explanation:

On a coordinate plane the negative side is left and down and positive is up and right so you can eliminate any answer with up or right. The point says its (-1,-3.5) which means it will be 1 to the left making it -1 and 3.5 down which will make it -3.5.