Choice A rationale:

"Height and weight.”.

Rationale: While monitoring height and weight is important for a child's growth and development, these parameters are not the primary vital signs to assess dehydration.

Dehydration assessment focuses on immediate physiological indicators, such as heart rate and blood pressure.

Choice B rationale:

"Heart rate and blood pressure.”.

Rationale: This is The correct answer.

When assessing a dehydrated child, monitoring vital signs such as heart rate and blood pressure is crucial.

Dehydration can lead to an increased heart rate and decreased blood pressure.

These parameters provide valuable information about the child's circulatory status and fluid balance.

Choice C rationale:

"Hair and eye color.”.

Rationale: Hair and eye color are not relevant parameters for assessing dehydration.

They are genetic traits and do not change in response to dehydration.

Choice D rationale:

"Shoe size and clothing size.”.

Rationale: Shoe size and clothing size are not relevant for assessing dehydration.

These measurements are related to a child's growth and body structure but do not provide information about their hydration status.