The problems of survival of animals on land are very different from those of survival of animals in an aquatic environment. what are four problems associated with animal survival in terrestrial environments but not in aquatic environments?

The 4 common problems that animals experience in terrestrial environments are respiration problems due to lack of oxygen or because it's polluted, conservation of water which might be found scarcely, successful reproduction, and producing and saving eggs that have to survive outside of water.