When opposite poles of two magnets are brought together, the poles
a. attract each other.
b. repel each other.
c. cancel each other.
d. cause a net force of zero

The correct answer is A.

Explanation:

In magnets, there are two poles: South and north poles. Like poles repel each other. Unlike poles attract each other.

When two magnets of the opposite poles are brought together then the poles are attract each other.

When two magnets of the same  poles are brought together then the poles are repel each other.

Therefore, the correct answer is A.

it is a negative acceleration

elctricity and magnet is conversion to it