(i) Seed coat – Protects the embryo inside the seed from damage, desiccation, and unfavourable conditions.
(ii) Cotyledon – Stores food (nutrients) that provides nourishment to the embryo during germination.
(iii) Radicle – Develops into the root system of the new plant.
(iv) Plumule – Develops into the shoot (stem and leaves) of the new plant.
This question asks for one function each — so one crisp line per part is sufficient. The seed parts (radicle → root, plumule → shoot, cotyledon → food storage, seed coat → protection) are standard NCERT content tested frequently. Avoid writing lengthy definitions; the examiner awards marks for correctly matching each part to its function.