As a biologist, if you become very interested in the study of the interaction of organisms with each other and the environment your speciality would be
Ecology
The correct option is B.
Explanation of the correct option:
Ecology is a branch of science that deals with the relationship between organisms and their interaction with the environment.
Explanation of the incorrect options:
Option A
Zoology is the scientific study of animals, animal life is ancient and is the division of biology that deals with the animal kingdom.
Option C
Botany is defined as the scientific study of the physiology and morphology of plants.
Option D
Herpetology is a branch of science, which is concerned with the study of reptiles and amphibians.
Final answer: As a biologist, if you become very interested in the study of the interaction of organisms with each other and the environment your specialty would be ecology.