Concept:The zygote formed after fertilization is the first cell of the new plant, and it develops into the embryo.
Explanation:During fertilization, a sperm cell fuses with an egg cell to form a zygote.
The zygote then undergoes repeated cell division and differentiation to produce the embryo.
The embryo is the young, immature plant within the developing seed.
In contrast, the ovule develops into the seed, while the ovary wall develops into the fruit.
The endosperm is a separate nutritive tissue formed during double fertilization, not from the zygote itself.
Therefore, the direct product of the zygote is the embryo, which later grows into a new plant during germination.
Answer:B. an embryo.