About 3-6 years of education. Hope i helped.
Answer: boxeo.
Because the article "el" implies tha the noun is male and singular.
1. La
2. Lo
3. Los
4. Lo
The pronouns lo, la, los, and las are used to take the place of a person, place or thing. You use lo for single masculine nouns, la for single feminine nouns, los for plural masculine nouns, and las for plural feminine nouns.
Hope that helps! :)
La oficina está lejos del correo.