When we type “network 10.0.0.0”, the EIGRP process looks at 10.0.0.0 network and turns on EIGRP on all the interfaces whose IP Address is in the subnet 10.0.0.0. Then EIGRP advertise the network which is the IP Address of the interface. For example, when I mentioned the below IP address on an interface

EIGRP process advertised 172.16.0.0/24 which was under the interface as shown below: