Final answer:
The correct option is d. The tone of the paragraph that begins in line 35 can best be described as didactic, meaning it is instructional or educational in nature.
Step-by-step explanation:
The tone of the paragraph that begins in line 35 can best be described as didactic. The word 'didactic' refers to a style of writing that intends to instruct or teach a lesson. It often carries a moral or educational message.
In the given context, the author's intent is to provide information and guide the reader. The paragraph may contain instructional or informative content that is meant to educate the reader on a particular topic.