Which AWS service or feature gives users the ability to connect VPCs and on-premises networks to a central hub?

Explanations:

A Virtual Private Gateway is used to allow communication between a VPC and a remote network (usually on-premises) over a VPN connection. It cannot connect multiple VPCs or networks in a central hub manner.

AWS Transit Gateway enables users to connect multiple VPCs and on-premises networks to a central hub, simplifying network architecture and management. It acts as a high-throughput backbone for interconnecting networks.

An Internet Gateway allows communication between instances in a VPC and the internet. It does not facilitate connections between multiple VPCs or on-premises networks.

A Customer Gateway is used to define the external gateway (on-premises) when setting up a VPN connection. It does not provide the capability to connect multiple networks to a central hub.