supaya kita dapat mengetahui perkara yang telah berlaku pada masa lampau. Misalnya, dunia hari ini wujud atas kesan daripada perubahan fizikal bumi yang telah berlaku di zaman air batu.
Answer: caballus
Explanation: caballus, were brought back to North America, first in the Virgin Islands, and, in 1519, they were reintroduced on the continent, in modern-day Mexico, from where they radiated throughout the American Great Plains, after escape from their owners or by pilfering (Fazio 1995).
