How did union strikes contribute to rising racial tensions in the 1920s?

Which of the following could affect the human population? a hurricane makes landfall on an uninhabited island. a deadly virus emerges that can pass from human to human. a civil war breaks out in italy. a solar eclipse occurs.

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

The maps below show the middle east. which best explains how the green areas depicted in the image on the left are reflected in the population map on the right? populations are greater in fertile areas that are close to freshwater sources, which is why more people live near deserts. populations are greater in fertile areas that are close to freshwater sources, which is why more people live near oceans. populations are greater in fertile areas that are close to freshwater sources, which is why more people live near mountains. populations are greater in fertile areas that are close to freshwater sources, which is why more people live near rivers.