Facile, in this context, describes something that is said without regards to the issues beneath the surface. Basically, it is to oversimplify or to be superficial about something. A recrimination is an accusation made in retaliation to someone else's accusation. This sentence is saying that these kinds of accusations should not be made without considering the situation's deeper issues.

The verb is outsell, which is a single word. It means to sell more than something else. So this sentence is saying that self-help books sales are almost double science book sales.

You would use the first sentence, but "make" should be "makes," since "animal" is singular. It would be better to omit "it is that" altogether and just say "Can you guess which animal makes this sound?"

Family is singular. Even though there might be many people in a family, the word itself is referring to a single group. "My family is from Chicago." "Does your family celebrate Thanksgiving?" but if you're going to refer to your family using a pronoun, you would use the plural "they/them" "My family is from Chicago, but they currently live in Denver."

They are not quite the same, a food court refers to a collection of food vendors usually in a plaza or a mall etc. A dining area is just anywhere designated for people to eat. So all food courts are dining areas, but not all dining areas are food courts.

Double prepositions are okay, but i believe in your sentences that: 1. “back” is a particle in the phrase “pay back” 2. “in” is a particle for the phrase “called in” so neither are prepositions. A few examples are: “Water shot -out of- the nozzle.” “The sound came -from in- that room.”

We also use the -ing form. Either way is okay.