Sagot :
Answer:
A. They are the mammals that lay eggs
Explanation:
The monotremes are a group of highly specialised egg-laying predatory mammals, containing the platypus and echidnas.
There are only five living species of monotreme, contained within two families.
Family Ornithorhynchidae the platypus, a single species in a single genus, Ornithorhynchus anatinus.
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