Any sentence not pertaining to wind turbines
The foreign translation the definitions
Assure could mean making sure something happens, to comfort or remove doubts from a person, or make someone sure of something.
If it's one word answers it could be persuading, guaranteeing, promising, convincing, reassure, satisfy, or tell.
I hope this helps without answer choices it's kind of hard to know what kind of answer you need. Have a great day!
First person
It takes a bit of reading into the passage to see what point of view it is, because there is little indication in the first paragraph. The first indication that it is written in first person is the use of "us" at the end of that first paragraph. Then, in the subsequent paragraphs the reader sees that the author uses "I" several times, indicating first person perspective.