Sentences that create a context to make the topic interesting are ...

[moongchi]

Sentences that create a context to make the topic interesting are called
 
  a. introductory or lead-in sentences.
  b. thesis statements.
  c. initial statements.

Question 2

A title of an essay should be
 
  a. a complete sentence.
  b. the first thing that the author writes (even before writing the text).
  c. a catchy or dramatic phrase used to get the reader's attention.

[FergA]

Answer to Question 1

a

Answer to Question 2

c