Three types of extreme environments where life forms have been discovered on Earth

For each extreme environment, discuss:

A.What makes this environment extreme? Why would most lifeforms find it hard to survive there? (about 100words for each environment)
B. What type of lifeform does exist in this extreme environment? How does it survive? (about 100 words for each environment)

C. Where might this lifeform be found on other planets or moons? Give examples in our solar system. (about 100 words for each environment)

 Note on Citations: For assignments you should simply cite the title, author (or publisher) and date of the article along with the URL