Probably the major advantage of walking upright was that it freed the hands to use tools and carry (the pray).
Another advantage is seeing further than on four legs, without the need to stop walking and raising oneself for a little while to look around ( like some animals do).
Answer:
E. abandoned, vacant factories, warehouses, and residential sites that may be contaminated from past uses.
Explanation:
A brownfield refers to a land that was used in the past for industrial or commercial activities which is not currently being used and that can be contaminated. According to this, the answer is that a brownfield is an urban area of abandoned, vacant factories, warehouses, and residential sites that may be contaminated from past uses.
Good luck on your work!! <3
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