In a predator/prey relationship, the predator is the organism that hunts and consumes the other organism, which is the prey.
From the options you provided:
- "grass and grasshopper" - The grass is a producer and does not eat the grasshopper, so this is not a predator/prey relationship.
- "mouse and owl" - In this case, the owl hunts and eats the mouse, making the owl the predator and the mouse the prey.
- "owl and mouse" - This is essentially the same relationship as the previous one, just reversed in wording, and also denotes the owl as the predator and the mouse as the prey.
Thus, both "mouse and owl" and "owl and mouse" would describe a predator/prey relationship, with the owl being the predator and the mouse being the prey. If you're looking for one specific answer, you can choose either "mouse and owl" or "owl and mouse."