<span>Bronfen Brenner was a developmental psychologist who studied how systems of social relationships affect child development across the lifespan. Bronfenbrenner's model describes how the child is simultaneously "acted upon" by environments that are both near (proximal) and far (distal). All primary influences would thus fall under the proximal system.</span>
He tried to end slavery and started the New Deal program.
Answer:
<em>b. an Operational Definition</em>
Explanation:
An <em>operational definition is the expression of conceptual model (or procedural statement) used to define the terms of a method required to determine the essence of an objec</em>t or an occurrence and its characteristics including period, volume, spatial expansion, chemical properties.
A sales tax is a tax on goods and purchases.