Why is it difficult to breathe at high altitudes?
Group of answer choices

Because you are closer to the sun the higher you go. loser to the sun the higher you go.

Because there is more carbon dioxide the higher you go

Because there is no oxygen in the troposphere.

Because atmospheric gases become thinner the higher you go. eric gases become thinner the higher you go.

Why did the medicine lodge creek treaty fail to bring peace to west texas? a. native americans protested the sale of weapons on reservations. b. supporters of the treaty face discrimination in their own communities. c. the united states government and native americans both refused to fully carry it out. d. the united states government prevented its military from entering reservations.