Well if you mean what does the controlled part of a scientific investigation, it is the part of the investigation that will be your control or your base, untouched, original, data and such.
Answer:
la agricultura se revolucion en el año de la mesopotamia
Well he should have packed for any type of weather that could come his way and he didnt and a lot of people know because of pictures that there is snow on the top of moutains because heat rises but heat can only go so far up and then it turns cold.
Answer:
b
Explanation:
they keep people from reaching their original destination due to the intervening opportunities
None of the Plains tribes were originally Plains tribes - they all migrated into the Great Plains when horses became available. Living on the vast, empty grasslands was almost impossible without horses, which made following the herds a practicable lifestyle.
Previously most of the Plains tribes had lived in the northern woodlands or east of the Missouri river
