In Anne Frank: The Diary of a Young Girl, Anne reports news about saboteurs. What is the meaning of saboteur?

someone who carries out military orders

someone who destroys or damages someone else's property

someone who assists or promotes someone else's goals

someone who opposes a regime through lawful debate

Someone who destroys or damages someone else's property.

Explanation:

When you're unsure about what a word means, you can look it up in a dictionary. A dictionary is an alphabetically arranged listing of words that contains different information about them, such as their definitions, examples, origin, pronunciation, etc.

A saboteur is someone who performs sabotage, i.e. someone who destroys or damages something deliberately. This often involves the destruction of someone else's property.

This is why the second option is the correct one.

hm, switch the relative; nominative and indefinite; objective ? not too bright in the knowledge of the english.