Which of the following actions increases the volume of your lungs?
a. Gases move from areas of lower pressure.
a. The rib cage becomes smaller.
a. The diaphragm flattens and moves downward.
a. Air pressure increases inside the lungs.

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.