Answer:
the branch of mathematics concerned with the analysis of strategies for dealing with competitive situations where the outcome of a participant's choice of action depends critically on the actions of other participants
Explanation:
In simple terms Game theory is the study of how and why people make decisions.
A batholith is an intrusive igneous rock.
Answer:
You can't unblock them without admin access to the router. The only way to visit such sites is to find a VPN that is not also blocked by the school.
But you should know, what you are trying to do can get you in trouble if the school's IT department is competent to any extent.
Answer:
HTTP stands for "Hyper Text Transfer Protocol" and is used for transferring readable documents across the internet. This matches the action "You visit a website"
POP3 stands for "Post Office Protocol 3" and is used for reading e-mail. This matches to the action "You check email in your inbox"
SMTP stands for "Simple Mail Transfer Protocol", and is used for sending email. This matches the action "You send an email to a friend".
FTP stands for "File Transfer Protocol", and is used for transferring files to and from other machines. This matches the action "You transfer a text document", although truthfully that description is so vague it actually matches all four of the given protocols.