Which technological tool uses a sound echo to measure distance?
a. sonar
b. submarine
c. ocean buoy
d. robotic probe

Analyze the central conflict and its in a story to discover the theme. o resolution o protagonist antagonist character

What is the statement plant growth is affected by the color light

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