Biotic interactions

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1	The relationship between a lichen and the tree it is growing on is called?
		Predation
		Commensalism
		Mutualism
		Parasitism


2	An example of a producer is?
		Mangrove
		Fish
		Fungi
		Crab


3	Why do we value mangroves?
		They form a buffer zone between the land and the sea.
		They are valuable nursery areas for many species of commercial fish.
		They remove silt form rivers.
		All of the above