Hmmm let me get back to you i have to read the book
A lot of common attention grabbers start with questions or short stories that place a person in the situation. Depending on how you plan on writing the essay you could start from the side of: technological advances in smartphones create easy to use resources for students, or go by something like how they can be used in emergency situations such as "What to do if someone is having a seizure" it really all depends on the main point you want to focus on with the essay.
The answer is: and.
Conjunctions join words, phrases and clauses in a sentence in order to avoid multiple, short sentences. In the example sentence, the conjunction <em>and </em>links the words shelter and rest.
The rest of the alternatives are incorrect because, in this particular statement, they function as prepositions, which usually precede nouns or pronouns and express relations among words in a clause.
1.) Pirate
2.) Spider
3.) Iceberg
4.) Lifetime
5.) Hotel
6.) Elbow
dude this is easy come on...
