The answer is "B", varied ecological regions.
Oklahoma contains 10 distinct ecological regions. That is more ecological regions per square mile than in any other state by a wide margin.
Slavery developed in the American colonies in the mid-1600s due to the economy of the South depending on the cultivation of crops; the need for agricultural labor led to the establishment of slavery.
I asked that question too
Answer:
D..........................................................................
I'm writing dots so it can be more than 20 characters
Answer:
A: a standardized system of weights and measures
B: city blocks laid out in a grid pattern
Explanation:
The Indus Valley Civilization was an ancient civilization located in what is Pakistan and northwest India today, on the fertile flood plain of the Indus River and its vicinity.
The significant features of Indus Valley civilization are personal cleanliness, town planning, construction of burnt-brick houses, ceramics, casting, forging of metals, manufacturing of cotton and woolen textiles.
