Answer: c. the effect of species loss on the environment
Explanation:
Ecologists is a scientists who studies various aspects of ecosystem. An ecologists study the impact of the environmental factors over the living beings. He/she also studies the interaction of one or more living beings among themselves. Such a professional studies about the functional role the organism in it's environment for example predator-prey relationship. Also the importance of the living being for supporting the life of other living beings and maintaining the non-living physical environment.
On the basis of the above explanation, c. the effect of species loss on the environment is the correct option.
