When added to the word detect, the suffix which means "a person who" is -ive.
"A person who" means that you need to create a noun which refers to a person by adding that suffix. If you add -ive to detect, you will get the noun detective, which is obviously a person.
The word detectary doesn't exist, and the word detection doesn't refer to a person, but rather the act of detecting.
Answer:
B. The story was told by the tribal elders
Explanation:
The verb is in the past tense, and the subject comes after the action.
Answer:
B. In order to give background information
Explanation:
Answer:
can't understand tell the question properly
Answer:
there is no question here