B. Living for a long time hope that help:)
Answer:
A gear is a rotating circular machine part having cut teeth or, in the case of a cogwheel or gearwheel, inserted teeth (called cogs), which mesh with another toothed part to transmit torque. A gear may also be known informally as a cog.
The colon is a punctuation mark consisting of two equally sized dots centered on the same vertical line.
