Answer:
Option C, number of different species
Step-by-step explanation:
Diversity in simple terms refers to the variation in any set of things/organisms.
Diversity in any sense has no relation with the “ability to resist change” as in some or the other way diversity provide scope to adapt changes and produce a stable environment or ecosystem. Thus, option A is incorrect
Number of individual organism do not represents diversity, as diversity represents number of different organisms. Thus, option B is incorrect
Interaction of different species is accompanied in an ecosystem which is directly proportional to the diversity with in an ecosystem (in maximum cases). The higher the diversity , the higher can be interaction among the species . Option D can be correct but considering the relevancy of the statement, option C is the better choice of answer