Why is sunlight so important for the inhabitants of the waters of the oceans?

Because if marine plants are not exposed to light, photosynthesis will not occur, they will die, herbivorous animals will be left without food, predatory animals, respectively, if the herbivores die. Plus, without plants, there will be no oxygen, they will not be able to breathe.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.