Simon and his friends are standing on a bridge. Simon's friends gently toss pebbles off the bridge. In contrast, Simon throws straight down. Which of these graphs best represents the velocity of simon's pebble as a function of time (t), with t= 0 representing the moment that pebble left simon's hand?

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.