PLEASE HELP ITS FOR STUDY ISLAND I WILL GIVE BRAINLIEST Airplanes reach cruising altitudes at the lower part of the Earth's stratosphere. This portion of the atmosphere is made up mostly of

and

options for first blank: nitrogen

water vapor

helium

options for second blank:ozone

carbon dioxide

oxygen

carbon monoxide

nitrogen and oxygen are found in the Earth's stratosphere, which is the second-lowest layer of the atmosphere. These are the two most common gases throughout the whole atmosphere.

Explanation:

Okkie dokkie here you are my friend!

physical, emotional, intellectual, spiritual, social and environmental

these are common warning signs of overtraining syndrome:

washed-out feeling, tired, drained, lack of energy

mild leg soreness, general aches, and pains

pain in muscles and joints

sudden drop in performance

insomnia

headaches

decreased immunity (increased number of colds, and sore throats)

decrease in training capacity/intensity

moodiness and irritability

depression

loss of enthusiasm for the sport

decreased appetite

increased incidence of injuries.

a compulsive need to exercise