A coral reef is a flower garden of stone, growing like a wall or like a tower from the depths, and filled with the most confusing and most colourful verieties of life. The colours are beautiful, especially in the shallow region down to sixty feet, where some if the red and yellow light of the sun's rays still penetrates. But most corals are greenish, brown, bluish or yellow. Coral reefs offer shelter and food to thousands of creatures. The warmer the climet, the greater the variety of species there is. In the tropics, it is easier to find, in one place, ten different species than ten specimens of the same species; and a coral reef provides ample proof of that rule. Living conditions are most favourable, so that many forms are able to develop and survive in their struggle for existance.

The main subject of the passage is__________.

According to the passage, viruses can ———.

In which of the following works do you come across the character of Jerry?

He ordered his coach to wait at a distance and desired I would give him an hour's audience; which I readily consented to, on account of his quality, and personal merits, as well as of the many good offices he had done me during my solicitations at court. Here, the speaker feels obligated because the visitor has-

Nine years ago, a rice paddy in castern Java suddenly began spewing steaming mud. Before long, it covered three square miles; road, factories and homes disappeared under a tide of muck. Twenty lives were lost and nearly 40,000 people displaced, with damages topping $2.7 billion. The disaster, known as the Lusi mudflow, continues to have its impact till now. A mud volcano, Lusi expels water and clay rather than molten rock. Such eruptions occur around the world, but Lusi is the biggest and most damaging known, Scientists have debated the cause for years, and two intensely argued hypotheses have emerged: Some believe an earthquake set off the disaster, others than the mudflow was caused by a company drilling for natural gas. Researchers largely relied on computer models and comparisons with other earthquakes and mud volcano eruptions. But recently scientists uncovered a previously overlooked set of gas reading collected at the drilling site by Lapindo Brantas, a natural gas and oil company, in the days before the mudflow began. In a report in the journal Nature Geoscience, the researchers said that the new data proves that the drilling by the company caused the disaster.

Which statement is false according to the information presented in the passage?