When you teach undergraduates, what do you tell students influences the realized niche? (poll 9028138)

When you teach undergraduates, what do you tell students influences the realized niche?

only competition

competition, predation, and parasitism

all interspecific interactions, and I make it clear that facilitation is important

all interspecific interactions, but I don't stress facilitation

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See this poll on: https://poll.fm/9028138/embed