Every person has a unique perspective and myriad of experiences that makes them who they are and leads them down different paths. Because the difficulties one faces are as unique as the individual, each problem must be approached with openness and curiosity. Thus, different treatment options are available as each person may have different preferences and needs.
Depending on what is going on for you and the availability of services (group therapy may not be available) your therapist will suggest to you what they believe will be the best fit. Because most people are familiar with individual therapy, they may not have considered the other treatment modalities. It may be beneficial to you to read more detail about the other treatment modalities and discuss them further with your clinician.
Ingredients for success in therapy:
Trust in the process.
Compatibility with the therapist (you should be able to trust your therapist and feel comfortable).
Investment of time and energy (therapy is as successful as the investment you put into it, it will also require outside work and commitment to change).
Willingness to experience discomfort (sometimes healing requires you to face difficult thoughts/feelings).
Openness and honesty (therapy will only be successful if you are able to discuss openly what the problem is so that you and your therapist can collaborate to resolve it).