What is the function of endosperm ?

Explanation

### Step-by-Step Solution:

1. **Definition of Endosperm**: Endosperm is a tissue found in the seeds of flowering plants (angiosperms) that surrounds and nourishes the developing embryo.

2. **Formation of Endosperm**: It is formed through a process called double fertilization, which occurs when one male gamete fuses with the egg cell to form the zygote, while another male gamete fuses with two polar nuclei to form the primary endosperm nucleus.

3. **Ploidy of Endosperm**: The endosperm is typically triploid (3n) in nature, resulting from the fusion of a haploid male gamete (n) with two diploid polar nuclei (2n). This combination leads to a triploid endosperm.

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