Answer:
I think its the architect and real estate agent vet sorry i can't do more
Explanation:
Architect: you might need a license to show that you are capable of building a safe and sturdy house
Real estate agent: you need to be extremely educated in real estate to get this job so you might need a license stating that you are a professional or you are cable for the job
Vet: they need to make sure you are capable of taking care of animals before you get the job