Which scientific design has limitations due to oversimplification?

D. In a study of the effect of lawn fertilizer on the health of a backyard pond, biologists grow two colonies of duckweed in a large flask to represent pond ecosystems. 

The scientific design in which has limitations due to oversimplification is the statement “in a study of the effect of lawn fertilizer on the health of a backyard pond, biologists grow two colonies of duckweed in a large flask to represent pond ecosystems”. Oversimplification is an overview and generalization of a statement to miscomprehension, misperception or even error. It overlaps the true statement.

Ilike to eat pears ya nah wha im sayin b? shout out to all my pears b.

Ican not answer this question since it does not have enough information