Final answer:
Bibliotherapy and psychotherapy can be helpful treatments for sexual anxiety.
Step-by-step explanation:
In addressing the question of which treatments have been found to be helpful in cases with a great deal of sexual anxiety, among the options provided, bibliotherapy and biotherapy are the most relevant. Bibliotherapy involves using reading materials and books to help individuals work through psychological issues, which can be beneficial in managing anxiety, including sexual anxiety. Although not directly listed, psychotherapy is another treatment that is well-supported in literature for managing sexual anxiety, as it helps individuals address the psychological factors contributing to their anxiety. Various forms of psychotherapy, such as cognitive-behavioral therapy, can be effective in this context. On the other hand, biotherapy generally refers to treatments that utilize living organisms or their products, such as certain medications or probiotics, which may indirectly affect sexual anxiety through overall health improvements.