The answer “b” is correct; the climax is the moment of greatest tension or excitement within a story.
A critical analysis essay aims to review or to critique something and when you write one you should always use FORMAL (option C) language.
In the second question you want to find the best option that persuades someone to eat tortillas, thus you should use the word ENHANCE (option A), because it means tortillas will improve the flavor or the quality of any dish. In other words, the other options are saying tortillas can be eaten with any dish and that it'll taste good, but if you use enhance, you are saying tortillas will make any dish taste better, which is a persuasive argument.
B) dignified
The author's tone is dignified because she is showing a serious manner that she thinks is worthy of respect.
The answer is seen because seen is an action therefore a verb
Hope this helps :)