Answer:
Note: CA here in the answer means Certificate Authority
Segmenting the role of the Root CA and Issuing CA to provide a secure configuration.
Keeping the Root CA offline, thus allowing the private key of the Root CA to be more secure.
Allowing multiple deployment of Issuing CAs at different geographical locations.
Greater control of Issuing CAs at different security levels.
Less management and implementation than a three-tier design.
Greater security than a single tier design.
More scalability for the security environment by deploying more Issuing CA.
It depends if you an athlete, if you workout, or if you do neither of those things. The average 16 year old that doesn't exercise regularly should consume anywhere from 150-350 grams of protein in a day.
Maybe you should take him to the hospital/doctor or go tell a nearby adult.