Complex sentence: K-selection is usually characteristic of large animals, but naked mole rats, which remain underground for most of their lives in nearly unchanging conditions, reproduce by this strategy for the most part and commit greater energy to maintaining their cells rather than growth and reproduction.
Split into simpler sentences: K-selection is usually characteristic of large animals, but naked mole rats, which remain underground for most of their lives in nearly unchanging conditions, reproduce by this strategy for the most part. They commit greater energy to maintaining their cells rather than growth and reproduction.