A is considered an essential worker.

a. barber
b. housekeeper
c. photographer
d. nurse

A d.nurse is considered an essential worker.

Explanation:

While states can designate what qualifies as essential, the standard definition of an essential employee is someone that performs work involving the safety of human life and the protection of property, according to the 2013 Essential Services Act.Essential workers are the personnel needed to maintain essential services. Non-essential services are the services that are not essential to a municipality's. survival and can be stopped or closed down during a pandemic.The meaning generally applies to workers in law enforcement and public safety, food production, health care providers and emergency personnel, among others. Essential employees are healthcare professionals, police officers, firefighters, grocery store employees, fast-food workers, truckers, and every single person who keeps civilization functioning during the quarantine.

Answervoid method;