Question

In a body of water, a fish remains at a constant depth while motionless. In the same body of water, a person sinks while motionless. Why? More than one answer may be true.

The fish displaces less water than the person.

The person has higher density than the water.

The fish has less volume than the water it displaces.

The fish has lower density than the water.

The fish has a lower density than a person.

The person has more volume than the fish.

The person has more mass than the fish.

Answer 1

In the water things will sink when the mass of displaced water is less then the mass of object, that means if object density is higher then water then it will sink

if density is equal to water it will remain standstill in depth of water.

So correct answers are

1) The person has higher density than water. that can only cause person to sink.

2) The fish has lower density than a person. Because since fish is stand still at some depth that means it has same density as density of water. and man has higher density than water