Jains stress nonviolence towards all living things, which is why animals needed for food are killed in the most humane way possible.
a. true
b. false

This is a false statement. If Jain stresses nonviolence towards all living things, when he wouldn't commit to the fact that animals would have to be killed in the most humane way possible, but rather that animals shouldn't be killed at all and that we should be eating in a vegetarian or vegan fashion instead. 

Where’s the diagrams?