They allow readers to multitask
1.) In the Victorian era, drinking water was very contaminated. The water was contaminated with raw sewage that would get into the drinking water. This made thousands of people catch diseases, such as cholera, and pass away. The correct answer is A.
2.) The antonym for the word earnest will be frivolous. An antonym is when the word is the complete opposite of another word. For example, pretty and ugly. The correct answer is A.
3.) Algernon finds that Mary Farquhar is indecent because she flirted with her own husband at dinner. Algernon did not want to sit beside of her in the first place because it was a common occurrence for her flirt with her own husband across the tables. In that era, it was not common to show feelings in front of others. The correct answer is B.
4.) There were not any cucumber sandwiches for Lady Bracknell because Algernon had absentmindedly eaten the sandwiches while waiting for the guests to arrive. His butler told the guests there was not any cucumbers in the market that morning and was unable to make the sandwiches. The correct answer is A.
I believe it’s c, I don’t know
Hope it helps
Well I'll just hit it kinda vaguely to hit it all at once. So imagine you do something nice for a person, like buy them a gift or a present, that will cause a fondness and a bond between that person and you, which in turn establishes a relationship. Pretty much, in order to cause a relationship, you have to establish a positive bond with the person or some kind of being. The effect of having a relationship would be something like a deeper trust in others, improvement of the same or other relationships, increased happiness and so on. (I'm just assuming that these are all positive relationships.) So, an example would be like, you see a nice girl/guy, you talk to them and become good friends which would result in establishing a relationship. After establishing a relationship, your relationship would become more intimate and you would become better friends, or maybe even become partners. You can even get a negative relationship by creating a negative relation, then as a result it would be a toxic relationship. The toxic relationship would then result in it being harmful.