The home's orientation, construction and landscaping can take advantage of the change in the sun's angle from summer to winter because 1. the sun's path in the sky is higher in winter.
2. the sun's path in the sky does not change from summer to winter.
3. the sun's path in the sky is lower in winter.

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper