The main responsibility of the transportation security administration is to provide police protection for airline passengers. maintain secure flight schedules for the airlines. make sure planes are mechanically ready for flying. screen passengers for weapons and explosives.

The main responsibility of the Transportation Security Administration is to screen passengers for weapons and explosives.

Explanation:

The Transportation Security Administration (TSA) is an agency of the Department of Homeland Security of the United States that manages security systems in American airports, subways and railways. It has 50,000 agents, inspectors, directors, managers and air marshals.

the number of calories in each pack of cookies has a greater variation than the number of calories in each pack of crackers.

the answer is b: the religion they practice.

here's why:

there were many different native american tribes and those with similar characteristics formed a main tribe or nation. each had its own language, religion and customs.