Which relationship benefits both species?

Answer and explanation

Correct answer: D. Mutualism between a legume and nitrogen-fixing bacteria

  1. Step 1: The plant gets nitrogen compounds and the bacteria obtain sugars. Answer: Mutualism between a legume and nitrogen-fixing bacteria. Why not the others: Parasitism between a tick and a dog: The tick benefits and the dog is harmed. Predation of a rabbit by a fox: The fox benefits and the rabbit is harmed. Competition between two plants for light: Both are harmed.

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