The answer is <span>It protects the seed until it matures.
Through the process of elimination: - </span><span>It protects the seed until it matures. YES. A female pine cone the unfertilized seeds until they become mature. Then, the cone opens and seeds fall out of the cone.
</span><span>- It makes food for the adult plant. NO. The food of plants in made of green leaves that contain chlorophyll in the process of photosynthesis. - It allows for photosynthesis to occur. NO. The cones have nothing to do with photosynthesis but they are responsible for reproduction. - It acts as an object to attract birds. NO. The birds look for colourful flowers while cones are woody. - It serves as an ornamental object on the tree. NO. Every part of plants has more important function than serving as an ornamental object.</span><span>
All of the frictions are the same, but weight always goes straight down so it can only be A or B. Since they are going down a slope, then the normal force must be sloped. A is the only one out of A and B with a sloped normal force, so it has to be A
