What should you do to avoid colliding with another vessel?

answer; i believe the correct answer is prefrontal cortex;

hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

because the early people found out about it.

answer; participants attitudes about gun control;