Respuesta :
Answer:
A compass needle is affected by Earth's magnetic field.
A magnetic field is strongest at the poles.
Explanation:
An element or a substance that attracts other metals is called a magnet. In magnet there are two poles, these poles are as follows:-
- South pole
- North pole
The correct option for the question is A.
The earth also behaves like a magnet and it has two poles just like a magnet.
When a needle is placed in water it deflects because of the magnetic effect of the earth.
Hence, the correct option is A that is a compass needle is affected by Earth's magnetic field. A magnetic field is strongest at the poles.
For more information, refer to the link:-
https://brainly.com/question/15804584