Final answer:
The seed sown by the two cousins in the neighbor's strawberry patch is likely the domesticated hybrid Fragaria x ananassa, as this is the most common type used in strawberry cultivation.
Step-by-step explanation:
The query regarding what kind of seed was sown by two cousins in a neighbor's strawberry patch is not directly addressed by the scientific references provided.
However, we can use the information to infer that the seed might be related to the cultivation of strawberries. Domestic cultivation of strawberries began with the hybrid species Fragaria x ananassa, which resulted from the natural hybridization of two American species.
It is most likely that the seeds sown by the cousins would be of this hybrid species, which is the predominant variety used in agriculture today.
If the cousins wanted the strawberry patch to thrive, they would likely use the seeds or cuttings from a domesticated variety, as wild strawberry seeds would not produce the large fruits that are favored commercially.