Can I see more of the question like the text
They are tired because look closely how they look like they are sweating so they are tired
El médico LE da una receta a sus pacientes cuando están enfermos y necesitan medicina
Answer: Encantado(a)
Step-to-Step Explanation: Mucho Gusto Means pleased to meet you so in return the best way to reply is Encantado(a) means delighted so that would mean "delighted to meet you"