What is the difference between a companion & a followers

A companion is more of a friend. They spend a lot of time with the one they travel with and go through the journey with you.

A follower is someone who just travels with you. They don't necessarily participate in things with you, as much as they are just there.

Thank you for your question! I hope this helped Have an amazing rest of your week and feel free to let me know if you need help with anything else! :D 

A follower just does as you do or say, a companion is a friend

Proper use of conventions result to sentence fluency.

Conventions are the surface feature of writing . It is the mechanics, usage, and sentence formation of writing. 

Sentence fluency is the rhythm and flow of the language, the sound of word patterns, the way in which the writing plays to the ear, not limited to the eye.

Forming of sentences with the correct punctuation, grammar, subject-verb agreement and other proper convention will result to sentence fluency because when a written material has cadence, power, rhythm, and movement, once it is read out loud, it will result to sentence fluency.