Imagine that an uncharged pith ball is brought into the electrostatic field of a charged tod. the side of the pith ball closest to the negatively charged end of the rod will

When an uncharged pith ball is brought into the electrostatic field of a charged tod, the side of the pith ball closest to the negatively charged end of the rod will also gain a negatively charged surface. Then, it will not attract to the charged tod but rather it will repel.

oh it is true if thats what you are asking

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it