Original sentence: 'With such long arms, orangutans are great at climbing.'
Is it correct? Yes — this sentence is grammatically correct and easy to understand.
Why it works (step by step for a 7-year-old):
- The little beginning, 'With such long arms,' tells us the reason.
- The main part, 'orangutans are great at climbing,' tells us what orangutans can do.
- Because the reason and the main idea match (the reason is about orangutans), the sentence is clear and not confusing.
Two simpler ways to say the same thing:
- 'Because they have such long arms, orangutans are great at climbing.'
- 'Orangutans are great climbers because they have such long arms.'
All three sentences mean the same thing. Nice sentence!