This is a trade-off, none of these is the answer alone. Maybe a better question would be how much of each element should we take into consideration as the weighted average. For example 0,2*water + 0,3*food + 0,25*health + 0,25*safety.
All of the priorities you mentioned are important for human survival and well-being, and it can be difficult to rank them in terms of priority because they are all interdependent.
Water is essential for human life, and access to safe and clean drinking water is crucial for overall health. Without access to water, people cannot grow food, maintain hygiene, or sustain themselves.
Food is also necessary for survival, and people need access to a varied and nutritious diet to maintain their health and well-being. Lack of access to food can lead to malnutrition, starvation, and a host of other health problems.
Health is integral to human well-being, and access to healthcare services is crucial for preventing and treating illnesses. Without good health, people cannot work, learn, or carry out daily life activities.
Safety is also important for human well-being and is a critical component of achieving a sustainable and just society. People need to feel safe in their communities and workplaces to thrive and reach their full potential.
In summary, all of the priorities you mentioned are interconnected and contribute to human well-being. They should be considered holistically and given equal consideration when making decisions and allocating resources to promote human welfare.