Answer:
There are five options in the question , let me arrange it for you then answer.
1) release oxygen into the air
2)release carbon dioxide into the air
3)get energy by eating producers
4)can be carnivores, herbivores, or omnivores
5)are the start of all food chains
Correct answers are : 2, 3 and 4
Explanation:
Consumers are animals so they respire and release CO2 into the air.
Primary consumers get energy by eating producers.
Consumer can be carnivore, herbivore, or omnivore depending whether they're primary, secondary or tertiary consumers.
Producers are the start of all the food chains not the consumers.
