With what scientific discovery is sir isaac newton most commonly associated? the theory of gravity boyle's law heliocentrism

theory of gravity

Sir Issac Newton proposed the theory of universal gravitation which defines that every object in the universe attracts every other object, and the gravitational force acting between these two objects is  proportional to the masses of these objects and, inversely proportional to the distance square between these objects.  

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.