CLEAN : STOCKSHOTS: Gazprom Arena in Saint Petersburg, host of several Euro 2020 games

The video provides a brief introduction to a marine-related topic, concluding with a statement.

What is the primary focus of the marine introduction?

• Marine conservation

• Marine engineering

• Marine biology

• Marine geology

Which aspect is emphasized in the conclusion of the marine topic?

• The challenges of marine pollution

• The future of marine technology

• The history of marine exploration

• The importance of marine ecosystems