They lay eggs and heat it with covered grass
Most, but not all, species of frogs are oviparous; that is, they lay eggs in order to reproduce. Some species of frogs give birth to live young, such as members of the African genus Nectophrynoides and other species found in the Andes and Central America.
Laying eggs allows crocodiles to reproduce, ensuring the continuation of their species. By burying their eggs in nests, they protect the eggs from predators and provide a suitable environment for them to develop. This reproductive strategy helps maintain crocodile populations in their environment.
On land ;)
Saltwater Crocodiles normally live alone although the babies may live in groups. Some male saltwater crocodiles hunt in groups to bring down very large prey like rhinos, elephants and great white sharks.
they live in swamps '
Crocodiles could survive in Texas. However, they do not naturally live there. American alligators do live in Texas along the Gulf Coast
born alive only birds lay eggs
eggs
Eggs
The manatee has a live birth
Only a liitle bit of mineral for the saltwater crocodile and the American crocodiles.
If by that you mean are panda's mammals and give live birth and not eggs, then it gives birth to live young.