The most common type of distribution pattern(s) in nature is(are)
a. regular
b. random
c. cluster
d. a and b

The answer is c. cluster.The most common type of distribution pattern in nature is clustered. That is because resources are patchily distributed in the environment. So, if resources are rare, or due to social factors, individuals would cluster together in the area where these factors are favorable.Random distribution is the least common type of distribution pattern and it is found in homogeneous environments, which are very rare.Regular distribution is the result of the competition for a resource or direct social interactions between individuals within the population, such as territoriality.