Morals, Morality
noun, の adjective
The way of virtue is the way you take if you have morals. Hopefully you have some.
どうとく
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
どうして動物には道徳感がないって断言できるの？
Why are you so sure that animals have no sense of morality?