Jo wants to find out about floating and sinking. She puts a rubber duck and a bar of soap in a bowl of water. The soap sinks and the rubber duck floats.
Complete the following sentence, you need to use two words.
The soap sinks because it has a
than the duck.

the soap sinks because it is more dense than the duck.

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.