Answer:
fleas carried the disease and there were fleas on rats and the rats hid in ships going across the oceans and then ran out when the ships arrived to their destined place. the fleas then traveled to household pets such as cats and dogs and because those pets came in contact with humans thats how humans caught it.
Explanation:
What observations are you talking about
Answer:
The mantle is solid.
Explanation:
The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers thick, and makes up 84% of Earth's total volume.
A community of organisms would have a down fall due to an unbalance in the food chain. Since a Grizzly bear is a third tropic level consumer, there would be an increase in tertiary consumers. This would then cause all the other level in a decrease in population due to over eaten.
