Christina is energized by being around people.
Christina displays the trait of "extroversion".
Other people would describe her as an "extrovert".
La economía es una ciencia social porque es responsable de analizar, describir e interpretar el comportamiento de los seres humanos en el entorno económico.
conserving natural vegetation will maintain the balance in our ecosystems.
The answer is
A. when aggregate income is high, people hold cash to buy goods that are plentiful and cheap.
