Answer:
Environmental pull factors are physical attractors
Explanation:
Push Pull
natural disasters warm or temperate climates
droughts coastal areas,
mountain views
flooding
lack of resources
Most of the Natural gas in the atmosphere results from the activity of producer organisms
Imma go with b it seems correct
Answer:
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The correct answer to this open question is the following.
Unfortunately, your question is incomplete. You did not include the description of the trade networks or the sources. Without that information, we do not know what you are talking about.
However, trying to help you with something, we can comment on the following example.
We can refer to the trade networks developed in the Trans-Saharan
trade. These traders were merchants of the African region -North and Western Africa- who traveled in caravans, using the camel to transport people and products across the deathly Sahara Desert.
They traded many products such as salt and gold, which were the most precious resources of the time. Gold was a valuable mineral with high value, and salt was as important to preserve food. But they also traded animal skins, ivory, silver, sugar, pepper, and slaves, to important trade centers such as Timbuktu and Djenne.
