GGold from the Sky. A group of amateur astronomers discover a catastrophic event and suddenly find themselves with the Global Order as they try to save the world.
Answer:
The correct answer is <u>B</u>: Large variety of organisms.
Explanation:
The article describes natural environments and ecosystems by analyzing different factors that are influencing their development.
The factor which contributes most to the sustainability of a habitat is a large variety of organism. A large variety of organisms increases the sustainability of a habitat.
Answer: "The (1846) crack" is what both sentences have in common, therefore we can combine them like this:
Since it could not be fixed, the Liberty Bell has had that crack in it ever since.