Which Term Best Describes the Symbiotic Relationship of Well-Fed P

Question

Which term best describes the symbiotic relationship of well-fed P.bursaria to their zoochlorellae?
A)mutualistic
B)commensal
C)parasitic
D)predatory
E)pathogenic

Accepted Answer

Mutualistic describes a relationship where both organisms benefit, in this case, P. bursaria provides a stable environment and protection for the zoochlorellae, while the zoochlorellae provide nutrients to P. bursaria through photosynthesis.