Answer:
Walk on the living, they don’t even mumble, Walk on the dead, they mutter and grumble. What are they?
Looks like water, but it's heat. Sits on sand, lays on concrete. A play on the eyes, but it's all lies.
I drift forever with the current down these long canals they’ve made, Tame, yet wild, I run elusive Multitasking to your aid. Before I came, the world was darker, colder, sometimes, rougher, true. But though I might make living easy, I’m good at killing people too.
I am a box that holds keys without locks, yet they can unlock your soul.
You can hold it without using your hands or your arms. What is it?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.