R1 uses a network route, not a host route, floating static route, or default route. The destination host is
10.10.13.10/32, but the routing-table entry that matches it is the OSPF-learned network prefix 10.10.13.0/25.
That prefix covers host addresses from 10.10.13.1 through 10.10.13.126, so the host address is included. A host route would be a /32 entry specifically for 10.10.13.10. A default route would be 0.0.0.0/0 and would be used only if no more specific route matched. A floating static route is a backup static route with a higher administrative distance; the exhibit shows an OSPF route being selected. Cisco CCNA v1.1 IP Connectivity emphasizes longest-prefix match and route-code interpretation. The router does not care that the destination is a single host; it forwards by the most specific matching route in the table. Here, that route is a network route.