Which of these is NOT a lubricant?

general term for all substances that can flow; gases and liquids

friction that slows an object as it moves through a fluid

a shape that easily moves through air

a shape that easily moves through water

the force that attracts a body toward the center of the earth, or toward any other physical body having mass

the closer objects are to each other, the stronger the attraction between them

when the sun, moon, and earth are in line; higher and lower than usual tides

when the sun, moon, and earth are at right angles; weaker, less extreme tides

dirt and debris that get pulled toward earth and burn up in the atmosphere: shooting stars

the maximum speed that can be reached by a falling object

This “center-seeking” force acts on an object moving in a circular path, and pulls the object toward the center

 This apparent force pushes objects outward when they’re moving around a center

Which of these fish can slice through the water most efficiently?