The answer is option A "second." The SI unit of time is a second other units of measure consist of mass, metre, temperature, and kilogram. A second is how you measure time because how 60 seconds equal a minute, 60 minutes equal a hour, 24 hours equal a day then so on.
Answer:lower temp molecules act slower so they come closer together and heated molecules are more spaced out that is why when you put an ice cube in a hot pan the ice melts and turns into a liquid due to heat the molecules space out
