Is this true

In a cross between two heterozygous pink pigs (Pp), about one - fourth will be white

if homozygous recessive pp means white then yes that’s true

Explanation:

If you make a punnet square using two pairs of heterozygous alleles you will see this

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.