The branch of biology that deals with relationships between organisms and their environments is called:
Ecology
The correct option is B.
Explanation of the correct option :
Explanation of the incorrect option:
Option A:
Demography is the statistical study of human populations.
Option C:
Dendrology is the study of the characteristics of trees, shrubs, lianas, and other woody plants.
Option D:
The living organisms in a community together with their nonliving or abiotic environment make up an ecosystem.
Final answer: The branch of biology that deals with relationships between organisms and their environments is called ecology.