What is buoyant force?

A. A force within a fluid that pushes downward

B. The attraction between two identical molecules

C. The attraction between two different molecules

D. A force within a fluid that pushes upward

This is the upthrust on an object which is placed inside a fluid

This force act upwards and always push upwards

so the correct answer is given as

D. A force within a fluid that pushes upward

this force is always due to pressure difference at two levels of

at lower level since pressure is more that is why the force is upwards and this upthrust is known as Buoyancy