Can u with some of them if u answer all of them i give u brainliest be quick it’s worth 50 points

How does water pollution affect the environment

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

Which phrase describes the time it takes for a planet to make a complete rotation