A programmer develops movies only.

A programmer creates music only.

A programmer is a robot.

squish a bug.

add music to it.

find and fix errors or bugs in the code.

make the program bad.

A trigger block is not in ScratchJr.

A trigger block is a block that is used to change only the background of the project.

A trigger block starts a character's actions in ScratchJr.

A trigger block is the only block that is used to play a sound in the project.

all of these and more.