I'm lonely can you be my friend

Which of the following sentences is grammatically correct?

In hard times by charles dickens, mr. gradgrind’s name can be interpreted in several ways. the selection supports all of the following interpretations except he grinds out graduates who are similar to each other as if he were running a factory he grinds the importance of facts into students’ heads he grinds down children by crushing their imaginations he grinds his teeth together, suggesting his intolerance for fantasy

Wha is"centrifugal bumble puppy "? why is it important for games to require a complication apparatus? (brave new world)