Animals have an instinctive fear of fire, but Koichi was an exception.
I always try to rely on my innate instincts as much as possible.
The bear sensed danger with its animal instincts.
The abilities you originally start out with are instincts. Animals have lots of them because they aren't very good at learning. They have to start out knowing them from the start.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.