A fertilized mature ovule which possesses an embryonic plant, food reserve and protective coating in a plant species is

Answer: Option D

A fertilized mature ovule that possesses an embryonic plant, food reserve and protective coating in a plant species is the seed, none of the options are given.
Embryo Sac is the female gametophyte of a seed plant, consisting of a thin-walled sac within the nucellus which contains the egg nucleus and other nuclei that produce endosperm upon fertilization.
An embryogenic callus is a defined and known genotype compared to seedlings, the high regeneration potential, and the stability of the regenerated plants.
The embryo is an unborn offspring with a developed heart and organs under the development process.