3 reasons why we study glaciers

1. It allows people to know where freshwater can be located in the world.

2. It provides information on global warming and climate change.

3. It gives scientists a clue on how specific landforms appeared.

Explanation:

"Glaciers" are constantly moving mass of ice. They are mostly located in Antarctica, Greenland and Canadian Arctic.

1. Glaciers provide information where freshwater is located. During cold season, it stores water as ice. Later, it melts and provides a source of freshwater to living things, including humans. Its taste is clean and fresh.

2. The rising temperature of the Earth easily melts the sheets of ice. This tells scientists about the Earth's temperature. Such melting of ice leads to increase sea level, which may cause storm surges.

3. The glacier landforms that have been created from erosion and deposition tells the scientists much about the origin of glaciers. It gives them knowledge on how the Earth was actually formed.

a and b because with the other three, they simplify to something else.