What three-tiered models of life?

1. The three-tiered model of health: This model divides health into three levels - primary prevention (preventing disease before it occurs), secondary prevention (detecting and treating disease in its early stages), and tertiary prevention (managing and treating chronic conditions to prevent complications).

2. The three-tiered model of education: This model divides education into three levels - primary education (basic education for children), secondary education (middle and high school education), and tertiary education (higher education such as college or vocational training).

3. The three-tiered model of government: This model divides government into three levels - federal government (national level), state or provincial government (regional level), and local government (municipal or city level). Each level has its own responsibilities and powers.

1. Biological - The biological tier refers to the physical structure and function of living organisms. This tier includes the study of cells, tissues, organs, and whole organisms.
2. Psychological - The psychological tier refers to the mental and emotional experiences of living organisms. This tier includes the study of perception, learning, memory, and motivation.
3. Social - The social tier refers to the interactions between living organisms and their environment. This tier includes the study of social behavior, culture, and economics.