If Elara stands on a hilltop and drops a ball, while Fenno stands on the ground next to the hill and also drops a ball at the same moment, what will be the behavior of the two balls with respect to gravity, and will Elara see Fenno's ball drop?

Provide a very brief response.
The ball dropped by Elara from the hilltop will fall downwards toward the base of the hill due to gravity. Likewise, the ball dropped by Fenno, who is standing on flat ground, will also fall straight downwards toward the ground. Both balls will accelerate at the same rate, assuming there is no significant air resistance.

Whether Elara can see Fenno's ball drop depends on her line of sight. If the hill is not too steep and there are no obstructions, Elara will likely be able to see Fenno's ball drop due to her elevated position. If the hill is very steep or there are obstructions such as trees or buildings, she may not be able to see Fenno's ball fall to the ground.