Ending the life of any thing living is murder in the broadest sense, to feed, clothe and shelter humans something must die plant or animal. I agree nothing should have to suffer to sustain us, however things must die or we do. Lions kill and eat gazelles, however they would die if they only ate grass. We don't know if plants suffer or are aware because it is beyond our understanding. Vegans have the right to believe as they do, however they are no more, no less superior or moral.

How do you know, vegetables and other plants respond to sound (music and conversation). The respond to touch (patience plant), they trap and eat prey (venus fly trap). They are aware of light and warmth. Because you cannot communicate with them does not mean they do not communicate with each other.