The expression Z+2z represents the solution to a problem. Which problem would it be the solution to?​

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

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