Exercise 2 - Part 1
For questions 1-8, think of the best word to complete each sentence.
The ocean depths have long been considered the final frontier on Earth, containing mysteries that have (1) scientists for decades. Exploring these extreme environments requires specialized technology capable of withstanding immense pressure. Early submersibles were limited in scope, but modern autonomous vehicles can (2) the abyssal plains undetected for days. These drones have uncovered bizarre ecosystems thriving around hydrothermal vents, completely cut off from solar energy. Creatures here rely on chemosynthesis, a process that converts toxic chemicals into food. This surprising discovery has radically (3) our understanding of where life can exist. It even offers vital clues regarding potential life on distant icy moons. Marine biologists are eager to (4) more data from these deep zones. Funding, however, remains a persistent barrier to progress, as deep-sea missions (5) astronomical costs. Private corporations are currently showing interest, drawn by the prospect of mining rare minerals. This economic interest has raised concerns about environmental damage to pristine habitats. Regulatory bodies are struggling to (6) strict international guidelines. We must act quickly before commercial exploitation begins to permanently (7) these fragile systems. Protecting the deep sea is essential, as its biological diversity could yield medical breakthroughs that (8) human health globally.