because poor choldren are very poor
Answer:
d. a theory.
Explanation:
A set of logically interrelated statements that attempts to describe, explain, and (occasionally) predict social events is known as a theory.
A theory is a body of systematized ideas that is formulated with the intention of explaining concepts and justifying certain courses of action.
In certain cases such as research, theories can be used to predict other variables. It can be said to be a body of generalized thought or belief that can be learnt and thought, as the set of principles that apply to a particular item concept or event.
Answer:
it completed a 3 ft (914 mm) narrow gauge main line from Mexico City to Nuevo Laredo in September 1888.
Explanation:
