Prefix is a word, letter, or number placed before another.
suffix is a morpheme added at the end of a word to form a derivative.
Yes, there are good as well as bad forms of self- love. Such as if you cant look in a nearby mirror while talking to someone. That would be a narcissistic form of self-love. However on the flip side, if you have the type of self-love to be confident, this is a positive form of self- love.
During a project concerning words in digitized books, researchers estimated a total of 1,022,000 words and they also said that this number would rapidly increase by several thousands in a year!
but, when you see a number like this, you have to keep in mind that these include different forms of the same word and some of these words may be archaic (referred to words that are not in modern day use)
according to the options given, the best answer would be c) 1,000,000