yes
Your question seems to suggest that mammals that feed milk to their young are a subset of mammals. But all mammals feed milk to their young. That, along with the presence of hair, is the defining characteristic of all mammals, without exceptions.
Yes. Almost all mammals feed milk to their babies.
They are mammals. All mamalls feed their babies on milk.
no
Yes, they do.
All female mammals produce milk to feed their infant young.
All mammals
Yes, moose are mammals.
Milk is produced in the "mammary glands".
Platypuses are mammals so, like all mammals, they feed their young on mothers' milk.
yes, they have to because they are mammals like humans. All mammals have to.
No, they do not. Amphibians lay eggs in water. The eggs give the embryos all the nutrition they need until they hatch. After that, they're on their own and live on small insects. No. Only mammals feed their young milk.