By its temperature and water vapour content
Answer:
Elderly people need a lot of protein but less energy and a pregnant woman need both nutrition enough to cell function and tissue formation of the embryo and more equal does the the 2 year old baby need both the nutrition.
The Big Five trait dimension or the five factor model is based on descriptors of personality. The big five traits are:
Openness
Beuroticism
Agreeableness
Extraversion
Conscientiousness
From these, the trait expressed is Extraversion. This trait is characterized by outgoing and energetic behavior. Energy creation is gained through external means.