Most parts of the country have daylight savings. in fall we set our clocks back an hour. in spring we
turn our clocks forward an hour. why? what is the advantage? what is the disadvantage?
the earth is tilted and the sun goes down earlier some parts of the year
a vaccine can keep people healthy and protect them from a certain virus. for example people in the united states get the flu shot when they get this shot the vaccine wont magically get rid of the virus but rather them fight it off and protect them in the future if they keep up to date getting the vaccine
d) the method associated with insect-free crop production