Answer:
Asexual and Sexual reproduction.
Explanation:
Reproduction can either have one or two parents. Based on this there is two types of reproduction:
Asexual: A type of reproduction where a single parent is divided by itself and reproduce its offspring.
Sexual: A process where two parents participate in producing their offspring.
THE COURT
The answer is: 3 tennis balls because there will be 4 ping pong balls used for every model and 12/4=3