Answer:
The correct answer is a. commitment.
Step-by-step explanation:
According to Sternberg's triarchic theory of love, commitment can be understood as the component of love that refers to the conscious decision that a person makes to stay involved with his/her significant other. It is a voluntary decision of remaining in lovedue to the levels of satisfaction that the relationship poses to the individual.
Commitment is seen when the couple is distanced due to several circumstances and it is the factor that has to be present in said situations for love to keep existing.
In this particular case, philip is in the military and often away fo months at a time. In those times of isolation, using terms from sternberg's triarchic theory of love, Philip and his wife are relying on Commitment to keep them together.