Final answer:
The sentences are corrected for errors and made into a compound sentence.
Step-by-step explanation:
The subject of the question is English, and the grade level is Middle School.
In order to correct the sentences, we need to fix the subject-verb agreement and spelling errors.
- Corrected sentence: Lions are big cats who are best known for their loud roar.
- Corrected sentence: Did you know that a lion can be heard from five miles away?
- Compound sentence: Sometimes people capture lions, but people want to save lions from harm.
Learn more about Correcting sentences