What kind of food service is the most expensive and requires the largest staff of skilled servers?

What are the phases shown in a and d called?

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

How do you tell if someone actually cares about you? and just say they do?