Answer is D
A- competition. Rabbits both want grass so it is a competition depending on how much grass there is.
B- competition. Owls and foxes hunting mice is considered two predators hunting, competition for food again.
C. Competition. Even plants don’t get along. Most plants need sunlight to stay alive and weeds grow quickly. The weeds are more or less silently fighting over the yard to keep growing.
D. Not competition. Algae is an underwater plant that most water life tend to feed off of. In this situation the fish would be eating the plant such as how the rabbits ate the grass, there would only be competition if there was less Algae and more fish. But in this case there is Algae and one fish.
Sorry if it sounds confusing but D is the correct answer
