Work is done on an object only if the force and displacement are ?

Which of the following is an example of motion in two dimensions?

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.

First to answer will be the brainliest i need the answer asap