For general projectile motion, the horizontal component
ofa projectile's acceleration
remains a
non-zeroconstant.
increases as a
functionof time squared.

continuouslyincreases.

continuouslydecreases.
is zero.

Zero.

Explanation:

In the general projectile motion there is only one component of acceleration which is in the vertical direction.There is no any acceleration in the horizontal direction.As we know that horizontal component of the velocity is remains constant in the projectile motion.

Therefore we cans say that in the projectile motion ,the acceleration in the horizontal direction is zero.

Therefore the answer will be zero.