The action that may increase the flask's carrying capacity for rotifers would be to decrease the number of microorganisms in the flask.
Carrying capacity
The carrying capacity of an environment refers to the maximum number of organisms of a particular species that the environment can support based on the resources it has.
Rotifers and microbes growing in the flask mean that both species would have to compete for the resources present in the flask. This competition will limit the reproductive capacity of each species.
As the population of the species decreases, the growth of the other is favored due to less competition.
With rotifers growing alone in the flask, there would be less competition for resources and more population growth.
More on carrying capacities can be found here: https://brainly.com/question/2375972
