Answer:
instrumental support
Step-by-step explanation:
Instrumental support refers to the concrete way people help each other. This form of support involves a concrete, direct way of supporting other person.
In this example, the support Abrie and Farah give each other is very concrete: Abrie let Farah use her discount card to buy a dress. In turn, Farah will help Abrie study for her biology exam.
These are examples of direct ways of supporting each other and therefore it's instrumental support.