What are the three types of symbiotic relationships?

The three types of symbiotic relationships are commensalism, mutualism, and parasitism.

• Commensalism: One species benefits while the other is neither helped nor harmed.
• Mutualism: Both species benefit from the relationship.
• Parasitism: One species benefits at the expense of the other.

So the correct answer is: commensalism, mutualism, parasitism.