Answer:
Internal locus of control.
Explanation:
The term locus of control refers to where do we situate the control of our lives. The locus of control can be either internal or external.
People with an internal locus of control base their success on their own work and believe they control their life.
On the other hand, people with an external locus of control think that it is the environment and external situations the ones who control their life.
In this example, Christina believes that if she wants good things to come her way, she must work for them, therefore she is volunteering at a food bank and studying extra hard to be admitted into a social work program she is interested in attending.
Christina knows that her success will be based on her own work and believes she can control this.
Thus, she is demonstrating an internal locus of control.