Anyone wanna talk on remind

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide

What is another way name for bd? cf, bd, cf, be

Saul reaches out to grab a pot of boiling water and something in his body sends a sensation to his brain to warn him of the heat coming from the handle. what organ is responsible for protecting saul from the heat?