Which statement describes survival needs?

• A. In appropriate amounts necessary for life; too little or too much is harmful
• B. Only nutrients are important
• C. Body temperature alone determines survival
• D. Oxygen alone sustains life

Answer: (A)

Survival depends on having essential needs in the right amounts. The body requires a mix of nutrients for energy and building tissues, water for hydration and chemical reactions, oxygen for cellular energy production, and a stable temperature to keep enzymes working properly. Each of these has a usable range: too little can cause deficiency, while too much can be harmful or disrupt normal function. That balance—needs in appropriate amounts—is what determines whether life can be maintained. The other statements are too narrow: nutrients alone aren’t enough without water and oxygen and proper temperature, temperature alone doesn’t guarantee survival, and oxygen alone isn’t sufficient because metabolism also depends on nutrients and water.