Why is precipitation typically associated with fronts?

a. fronts have higher relative humidity than the surrounding air.
b. along fronts, warm air rises, cools, and causes water to condense.
c. the warm air draws moisture out of the cold air, which then falls as rain.
d. when warm air and cold air mix, water droplets can form and fall as rain. v

the answer is A. Fronts have higher relative humidity than the surrounding air.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

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