How does Zionism and Arab Nationalism lead to conflict over Israel/Palestine?

Which of the following is a way that advancements in technology improve humans' ability to measure air quality and protect human health?

What would be the distance of all the planets to the sun in astronomical units?

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory