Which of these factors best explains why liquid water exists on earth ? a. weak salinity of earth oceans b. earth strong gravity c. presence of living things on earth d. freezing temperatures at earth poles the answer is b and this for apex

The "right" answer would be something like

"The temperature of the earth is such that permits the existence of liquid water"

Now let's analyze the option that can mean this:

The b option "Earth strong gravity" is related to the mass of the earth, and the mass of the earth is, in some way, what defines the orbit that Earth has around the sun.

So if the orbit of earth was closer to the sun, the liquid water would boil, and if the orbit was further away from the sun, the liquid water would freeze.

Then the option b is the one that best explains why liquid water exists on earth.

volume: 22

density: 7.04

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.