Answer
b.
Work Step by Step
Option a. is incorrect. Mutualism occurs when both species benefit.
Option c. is incorrect. In commensalism, one species benefits while the other species suffers no effects.
Option d. is incorrect. Succession is the process by which an ecosystem's species changes over time.
Option b. is correct. The tick is benefiting whereas its host is being harmed. This is an example of a parasitic relationship.
