Which of the following statements is true?

Poverty always affects whether individuals are able to reach their full intellectual potential.
An individual’s intelligence is determined solely by the intelligence levels of his siblings.
The environment in which an individual is raised is the strongest predictor of her future intelligence
There are many factors working together to influence an individual’s intelligence level.

Many studies claim that only genetics influence an individual's intelligence levels, others believe that the environment is responsible for influencing intelligence levels. There are still those who claim that the union of these two factors is responsible for influencing intelligence levels. However, the truth is that intelligence levels are influenced by the union of several different factors. These factors are:

Heredity: It is the condition that establishes the limits within which intelligence can be developed.

Age: Intelligence manifests differently according to development and age.
Socio-Cultural Environment: They can stimulate the abilities of the individual: the variety of experiences that they live, the schooling of the parents, the affection, among other aspects.
Expectations: From yourself or those around you, whether positive or negative, can stimulate or block intellectual development.