While plant and animal cells have structural similarities, they also differ in a few ways, including in shape. plant cells tend to be rectangular and have distinct edges, while animal cells vary widely in shape and tend to have rounder, more fluid edges. which statement best elaborates on the reason for this difference? a) animal cells have rounded edges because they contain cell walls, while rigid plant cells do not need cell walls. b) rectangular shapes plants absorb sunlight during photosynthesis, and round shapes animal cells absorb oxygen. c) animal cells vary in shape because they have different functions, while plant cells are rigid to plants grow upright. d) plant cells are rectangular because they are all connected within a plant, while animal cells never come in contact with each other.