6:1 Ratio means that it is easier to move the materials. SA = ^2, while V = ^3. That means volume increases at a faster rate than surface area. That is why is it optimal to have a high SA:V ratio, which is why cells are so small.
all can harm when extreme
Answer:
they can fly , which requires alot of energy & keep their body warm with their feathers
Food enters the stomach during the third stage of digestion, hope this helps.
