What are the signals the body receives that indicate the onset of an oxygen deficit?

is your crush sammer?

Explanation:

are you in 8th grade

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

: )