Question

Explain why the amount of water a person needs to survive can be highly variable.
in paragraph

Answer 1

The amount of water a person needs to survive can vary widely because hydration requirements depend on many interacting factors: body size and composition (larger or more muscular people have greater water needs), age (infants and the elderly regulate fluid differently), activity level and heat exposure (heavy exercise or hot, dry climates increase sweat losses), and diet (high‑salt, high‑protein, or low‑water diets require more drinking, while fruit‑ and soup‑rich diets reduce it). Health status is crucial too — fever, diarrhea, vomiting, infections, kidney or endocrine disorders, pregnancy and breastfeeding all raise fluid needs, and some medications (diuretics, laxatives) increase losses. Acclimatization to hot environments, altitude, metabolic rate and even ambient humidity further alter how much water is lost and thus must be replaced. Because these variables differ from person to person and over time, there is no single survival‑water amount that fits everyone.