Which of the following is not included in a freshwater ecosystem?

What happens during the first step of ozone formation in the atmosphere?

Which of the following organisms is a producer?

Larger animals kill smaller animals in the forest,eat whatever they can,and leave the rest in the forest,but the forest is never found full of dead animals. What happens to the bodies of these dead animals?

Which radiations are prevented from reaching the Earth by the ozone layer?

What would be the consequence if all the herbivores are removed from a grassland ecosystem?