Assertion: Communities that comprise of more species tend to be more stable.
Reasoning:: A higher number of species results in less animal variation in total biomass.
Reasoning:: A higher number of species results in less animal variation in total biomass.
Answer & explanation
Correct answer: option 1
Communities with higher number of species are more stable as it can resist occasional disturbances. A stable community should show less variation in productivity from year to year and resistance towards invasion by alien species. That is there is less variation in case of invasion of other species or extinction of an existing species.