Identify the situation where work is being done. Carrying a box of crayons across the room. Lifting a backpack off the floor Holding a football Sitting on a stool

Work means to use force on an object and move it a distance, so the correct answer is Carrying a Box of Crayons across the room

Lifting the backpack off the floor. Force is being applied in only one direction then (up) which is what constitutes as work. Carrying the box of crayons applies force in two directions (up and forward), which cancel each other out. Work has a vector, which is a quantity containing both direction and magnitude (one, finite direction, not two).