The original sentence is: The bear cub learns new things by going with its mum.
This sentence is mostly correct, but it can be improved for clarity and naturalness. A better way to say it is:
- The bear cub learns new things by going with its mom.
Explanation:
- "Mum" is common in British English, and "mom" is more common in American English. Both are correct depending on where you are.
- The sentence is clear and understandable, but to make it sound more natural, you could also say: The bear cub learns new things by staying close to its mum. or The bear cub learns new things by following its mum.
So, your original sentence is grammatically correct, and only minor adjustments might make it sound smoother.