I have a question about mass and acceleration?

It's simple

If you throw both of them with same force than

Greater the mass lesser the acceleration.

that means ball with higher mass will have lower acceleration.

Kinetic energy is created when a force does work accelerating a mass and increases its speed. Just as for potential energy, we can find the kinetic energy created by figuring out how much work the force does in speeding up the body.

Force, mass and acceleration - Newton's second law

In Newton's analysis of motion, the relationship between the net force acting on a body and its acceleration defines both force and mass.

Remember that a force only does work if the body the force is acting on moves in the direction of the force. For example, for a satellite going in a circular orbit around the earth, the force of gravity is constantly accelerating the body downwards, but it never gets any closer to sea level, it just swings around. Thus the body does not actually move any distance in the direction gravity’s pulling it, and in this case gravity does no work on the body.

Consider, in contrast, the work the force of gravity does on a stone that is simply dropped from a cliff. Let’s be specific and suppose it’s a one kilogram stone, so the force of gravity is ten newtons downwards. In one second, the stone will be moving at ten meters per second, and will have dropped five meters. The work done at this point by gravity is force x distance = 10 newtons x 5 meters = 50 joules, so this is the kinetic energy of a one kilogram mass going at 10 meters per second. How does the kinetic energy increase with speed? Think about the situation after 2 seconds. The mass has now increased in speed to twenty meters per second. It has fallen a total distance of twenty meters (average speed 10 meters per second x time elapsed of 2 seconds). So the work done by the force of gravity in accelerating the mass over the first two seconds is force x distance = 10 newtons x 20 meters = 200 joules.

F1 = m1 a1

F2 = m2 a2

It is given that F1 = F2

m1 a1 = m2 a2

m1/m2 = a2/a1

If m1> m2, a2 >a1

Thus bigger mass has small acceleration for the given force.

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You should've picked A because acceleration has to include speeding up, speeding down, or changing direction. I think thats the right answer but I KNOW that acceleration HAS to INCLUDE SPEEDING UP SPEEDING DOWN, CHANGING DIRECTION.

F1 = F2 m1*a1 = m2*a2 since m1 > m2 a2 has to be gr8r than a1

How girls both balls will b of differnt mass???