When a boy stands in a field in the sunlight, he usually is able to see his
A: shadow

The freezing and thawing action of water affects a rock by
A: gradually breaking down the rock into smaller pieces.

A solution of lead (II) nitrate reacts with a solution of sodium iodide to produce a yellow solid of lead (II) iodide and aqueous sodium nitrate. Which of these illustrates the reaction?
A: Pb(NO_{3})_{2}(aq) + 2NaI(aq) -> PbI_{2}(s) + 2NaNO_{3}(aq)

A baby kit fox grows to become an adult with a mass of over 3.5 kg. What factor will have the greatest influence on this kit fox's survival?
A:
the conditions of the fox's habitat