Zone 9 I think if I’m not mistaken
The best answer to this question is:
C. A forest fire that was caused by lightning.
A forest fire could kill for example all the individuals of a certain species in a given area - this would be independent of the population density of the species. All the other factors would affect the population the more, the more dense it is.
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The answer is D. heat flow and the movement of material inside the Earth
That is the only really obvious answer since it's basically talking about plate tectonics.
Answer: Roman Empire:
Powerful Lords Broke up the empire into separate kingdoms.
Without trade, people had to find their own food and basic necessities.
Knowledge of math and science was lost
Gupta Empire:
Hunas were absorbed into the local culture.
Invaders destroyed Hindu temples.
The feudal system began as people turned to lords for protection.
Explanation for Roman Empire. Trade in Rome ceased because all of the roads were in such horrible condition that people could not travel on them. Rome had advanced knowledge of math and science but all their notes on them were mostly destroyed or lost. Rome was divided into two parts the western and eastern kingdoms.
Explanation for Gupta Empire. Hunas began invading Gupta, (Gupta Empire was strongly and mainly Hinduism) they destroyed hindu temples and took control over the Gupta empire and were absorbed into their local culture. The Gupta empire took to feudalism in order to gain protection from foreign invasion.