The answer is A) Birth rate
-- To increase the frictional force between the two surfaces, press them together
harder, or rough up the area of contact with sandpaper or dirt.
-- To decrease the frictional force between two surfaces, decrease the force
with which they press together, or smooth (polish) the area where their surfaces
contact, or make the area <em>seem</em> smoother by lubricating it with grease, oil, air,
or smooth leaves.
90 - 29 = 61 therefore b=61 because the red square shows that that angle is 90 degrees then minusing 29 degrees from that would give you 61 degrees
The answer would be B. Chloroplasts
