Answer: Give more details and information so that we can help you out.
1 I will Approve when I take my Math test. 2 You must have self approval before you can go on an airplane. (to approve, aprroved) Happy to help you! :)
Options two refers to the author being a teenager himself so he would be reliable for this info because it is firsthand.
Answer:
If everyone died, no one survived...
Answer:
"Without innovations in food production, the factories could not have grown so quickly. The trend quickened after 1860 and continued throughout the 21st century as well."
Explanation:
Because in the previous sentence it already stated the same thing. (PS I probably got this wrong)