Answer:
To measure motion, you must be able to compare it to a reference point, or a non moving point.
1st -When cells are small, the movement of food and waste can be efficiently handled by the cell membrane
If a star appears to be very red, it would be in the spectral class "M" since that is where it is the lowest temperature, with the slowest waves.
Answer: M
Hope this helps!
In low light no plants grow. With no plants no animals can eat so less animals remain or stay there. With less animals less animals respire and breathe out CO2.
