How to answer all the kid's questions?

My 3 year old started talking a year ago and the vocabulary and questions have been increasing at a steady pace since then. It is a lot of fun seeing him learn and observe so many new things. The questions have started getting a little trickier now. We are often times challenged to work around very common questions on the topic of life and death, of violence and all things good and bad, of jealousy, anger and such. How do we tell them the answers to questions without alluding to all that?. How do we talk about herbivores and carnivores without making the animal in question sound evil?.I'd love to hear from parents with experience handling such stuff.