I believe the answer is Metaphor
Answer: When someone has lost mental alertness or has become senile, they are to have gone round' the bend.
Explanation: (|/._.)|/ C\_/
I tried. have a teacup
Explanation:
The philosophy of the hospitality industry is essentially connected to serving people. ... A strong service-based philosophy, consistently demonstrated by service providers, guides hospitality personnel in their efforts to achieve customer satisfaction, and ultimately, business success.