The relationship between acacia trees. The trees have thorns to house and sugar to feed the ants. The ants live in the thorns and run out to attack and bite any animal that tries to eat from the tree. Which type of symbiotic relationship is this an example of?

Mutualistic relationship

Explanation:

A symbiotic relationship is defined as the close and long-term biological relationship between two different organisms for example :  parasitic., mutualistic, or commensalism.

Ants and acacia trees have a mutualistic association because trees provide food and shelter to the ants and in return ants protect trees from other herbivores.

Hence, the correct answer is "Mutualistic relationship".

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