Answer:
Dependent clause
Explanation:
It doesn't make sense right now standing alone, it needs an independent clause to "depend" upon. For example: "Whatever she wanted to be doing at this time, I will let her do it."
Sam and Eric are twins. Though they are two individuals, they are identified as one with the nickname "Samneric".
Their companions can't tell them apart so instead of using their names, their friends combined their names and used it to address any one of the twins.
Samneric do things together. They think alike. Basically, they are identical in all ways from physical appearance to their characters.
How about this: Sports will be fun and fair if everyone have good sportsmanship and knows the game well.
Expository development is explanatory information in a story.
You can try starting with a question, fact, or sound affect to help grab a reader's attention, but it should fit well with your topic.