Does the sentence "It remained the only mode of subsistence until the end of the Mesolithic period some 10,000 years ago, and after this was replaced only gradually with the spread of the Neolithic Revolution." provide a valid answer to the question "What began replacing hunting-gathering at the end of the Mesolithic period?"

A: yes

Does the sentence "Treaties of "mutual guarantee" are international compacts, e.g., the Treaty of Locarno which guarantees each signatory against attack from another." provide a valid answer to the question "The Treaty of Locarno guarantees each signatory against what from another signatory?"

A: yes

Does the sentence "The largest group of mammals, the placentals, have a placenta, which enables feeding the fetus during gestation." provide a valid answer to the question "Which specific mammal is the largest today?"

A: no

Does the sentence "For example, at the time those nations were being established, factions known as "federalists" in the United States and Australia advocated the formation of strong central government." provide a valid answer to the question "What is the meaning of federalism?"

A:
no