defective : something has not completed correctly.
We have defective technology on raising animals.
rip off : tear something such as paper or animal's skins.
I ripped off the poster I made that my teacher gave. 'D.'
guarantee : Goods that can change or replace when that has a problem
Markets are guaranteed.

Please be mindful of the words you choose, good job Great! you are really improving now! I just made some few corrections so kindly check it.

Love,

Teacher Veronica