A megalithic burial had remains of two skeletons. An appropriate way for…

Concept

Determining the biological sex of skeletal remains is a question of osteology (the study of bones), not of the objects buried alongside them. Sex is read from durable anatomical features of the skeleton itself — most reliably the pelvis (the female pelvis is broader and the pelvic cavity wider, adapted for childbirth) and secondarily the skull and overall robustness of the bones.

Applying it here

The four clues offered must be judged on whether they reveal biology or merely culture:

• Bone structure — a direct biological indicator; the shape of the pelvis distinguishes a female skeleton from a male one. This is the reliable scientific method.

• Ornaments found with a skeleton — a cultural grave good. Both men and women could be buried with jewellery, so it tells us about burial custom, not biological sex.

• Size of the skeleton — stature varies widely within each sex and overlaps heavily between them, so size alone cannot identify a female.

• Cooking utensils — these are burial offerings tied to belief and ritual, not a feature of the body; they say nothing about the sex of the person.

Only the bone structure (clue A) is a valid way to identify a female skeleton, so the choice that selects A alone is correct.

Cross-check

Any option that pairs bone structure with ornaments brings in a non-anatomical artifact, and pairing it with size adds a skeletal measure that is real but unreliable because of overlap; the option resting only on cooking utensils uses no biological evidence at all. Selecting bone structure by itself is therefore the single defensible answer — consistent with the NCERT account that the pelvic region is the dependable indicator of sex in a skeleton.