<span>In the phylum anthophyta, seeds develop within the ovary, which matures and ripens into a fruit. 
Anthophyta are flowering plants, resembling flowers, and as you already know, regular flowers have ovaries used for seeds, and when a plant grows, it can bear a fruit.
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I think your answer is a hot summer. during this phase, there would be rapid growth in vegetation leading to increased population in rabbits and other rodents...