A"hook" is a technique generally used in the an essay. a.main body
b. thesis statement
c. conclusion
d. introduction

A hook is used in the "introduction" to interest the reader in what he is going to read in the following paragraphs. 

B. alice is pretending there is a way through the glass when in reality that would not be physically possible therefore she has to pretend. but i think d is also possible because alice notices the glass is actually melting away which is also not possible either