Answer:
1. Reinforcement is a type of natural selection.
Step-by-step explanation:
A process of speciation in which the occurrence of natural selection promotes the reproductive isolation within the population of two species is referred to as reinforcement. It occurs when selection functions not in the favor(against) of the generation of hybrid individual that possess low fitness.
The concept was formed first by Alfred Wallace. Hence, the name Wallace effect. Reinforcement points in the direction of some of the situations in which selection can boost and cause an improvement in prezygotic isolation, influencing the process of speciation directly.