Explain the term “microgravity.”

Microgravity refers to a condition in which objects experience very low levels of gravitational force, making them appear weightless. This phenomenon is commonly observed in orbiting spacecraft, where both the spacecraft and everything inside it are in a state of free fall, creating the sensation of weightlessness for the occupants. In space, even though gravity is still present—it is not completely absent—the effects of gravity are significantly reduced due to the high velocities of orbiting objects. This environment allows for unique scientific experimentation and research that would be impossible under Earth's full gravitational force. The other options either misrepresent the concept of microgravity or relate to gravity in ways that do not align with its definition in the context of space science.