C) sharing of one or more resources between the two species
D) mutualism between two species
Explanation
[Solution from source] A niche overlap means two species use one or more of the same resources (food, space, etc.), which can lead to competition. Two parasites on the same host is just one possible case and is not what the term means. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.