If a mouse eats grass, a snake eats the mouse, and an owl eats the snake, the owl is considered the (4 points) producer secondary consumer primary consumer tertiary consumer

Im pretty sure it would be a primary consumer because Primary consumers are animals that eat primary producers aka herbivores (plant-eaters). Secondary consumers eat primary consumers aka carnivores (meat-eaters) and omnivores (animals that eat both animals and plants). Tertiary consumers eat secondary consumers.