C is wrong because non-magnetic materials will not repel from a magnetic force , nothing will happen to the non-magnetic material so the answer should be A&B.

Ans : 2

It is because if there isn't any gravity, the ice would be flying all over the place.

It is not 1 because he/she is not pulling the ice.

it is not magnetic force because it is not a magnet.

it is not 4 because it is not rubbing against anything.

B is correct as P increase in a shorter time than Q.

A is correct as one of the organism is prey to the other two organism. Therefore, its reasonable.

C is correct as the graph shows that more R than Q and P at the beginning.

Because there is more than 2 occasions where 2 organism have the same population

When X is fused, bulb Y and Z would not light up.

Bulb W will light up because it is a close circuit.

It was because if there no frictional force

the pair of tongs will slip of his hands

Only animal G is both prey and predator and if an animal feeds on plant ,it is not considered as a predator...

If there is no gravity, he would not be able to hold the ice cube.

A magnet can only repel other magnets with their like poles

A magnet can also attract magnetic materials.

and it gets eaten by organism H

G eats D ,H eats G