Given a scientific passage and an answer, generate a question for the given answer.

[Q]: Passage: 19.4 Community Ecology Communities include all the different species living in a given area. The variety of these species is referred to as biodiversity. Many organisms have developed defenses against predation and herbivory, including mechanical defenses, warning coloration, and mimicry. Two species cannot exist indefinitely in the same habitat competing directly for the same resources. Species may form symbiotic relationships such as commensalism, mutualism, or parasitism. Community. Answer: symbiotic
[A]: Commensalism, mutualism, and parasitism are known as what type of relationships?

[Q]: Passage: Resistance is the property that determines the amount of current flow through a particular material. Answer: resistance
[A]: What is the property that determines the amount of current flow through a particular material?

[Q]: Passage: Runoff is precipitation that flows over the surface of the land. This water may travel to a river, lake, or ocean. Runoff may pick up fertilizer and other pollutants and deliver them to a water body. In this way, runoff may pollute bodies of water. Answer: runoff
[A]:
What term describes precipitation that flows over the surface of the land?