In what ways are sponges important

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters

Which of the following human activities resulted in the growth of the north american deer population?