The importance of vaccinations in preventing large out breaks of influenza

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

the answer would be a

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest