Question

question 17
complete the following sentence.
some sharks have suckerfish that eat parasites from their skin. the sharks provide protection for the suckerfish in return. this type of relationship between the suckerfish and the sharks is known as
competition
mutualism
predation
question 18
complete the following sentence. environmental science can answer questions about ______ by analyzing and observing the world and testing ideas about it.
physical laws
moral values
philosophy and art
natural phenomena

Explanation:

Question 17: In mutualism, both species benefit. Sucker - fish get food (parasites), sharks get skin - cleaning and protection is given to sucker - fish.
Question 18: Environmental science studies natural phenomena through analysis, observation and testing.

Answer:

Question 17: C. mutualism
Question 18: D. natural phenomena