It might have been that once the Earth started to warm, some animals weren't able to adapt. Or possibly because new needs had to be met, so they found new animals to domesticate that could help with the new situation.
Horses, gunpowder and guns (firepower), diseases, native allies, infiltration, are some of the factors that aided the spanish conquest for the incas
hope this helps
Answer:
D
Explanation:
to "bear arms" means to own guns/firearms