Complex sentence: African elephants also have have bigger tusks, large modified incisors that grow throughout an elephant's lifetime, they occur in both males and females and are used in fights and for marking, feeding, and digging.
Split into simpler sentences: African elephants also have have bigger tusks, large modified incisors that grow throughout an elephant's lifetime. They occur in both males and females and are used in fights and for marking, feeding, and digging.