They were adjusted to the local climate.
Option: B
Step-by-step explanation:
Ice age is known as colder period where temperature decreased globally and glacial expansions took place over millions of years. One of the Ice age consequence in North and South America is development of Homo sapiens by opting harsh climate with the help of bone needle in order to weave warm clothing , they used land bridges to grow in new regions. When Holocene epoch started they took advantage of favorable conditions and developed agriculture, also domestication techniques.