“Is talk therapy effective for anxiety?”

Yes, of course. psychotherapy will allow you to explore the underlying causes and issues causing the anxiety. Also it is possible that medication may also be helpful.

Yes; however, CBT is scientifically validated to be one of the most effective forms of talk therapies to treat anxiety spectrum disorders.

Thank you for your question. Yes, talk therapy can be extremely effective for all forms of anxiety! Whether you're taking medication or not, psychotherapy can augment by teaching you skills to deal with your anxiety and the ways it manifests in your life. If you've never tried therapy, please give it a chance. You'll be pleasantly surprised.
Best of luck and congratulations for being proactive about your mental health.

Talk therapy can be an effective therapy for anxiety. Anxiety usually involves a subconscious looping preoccupation with threats to survival or wellbeing, and since the subconscious mind doesn't respond well to reasoning it has to be communicated with in other ways. Sensory-based imagery, symbols, metaphors, and stories are often quite effective in bringing the mind into the present and interrupting the pattern of constantly predicting bad experiences that repeat threats from prior experiences. Therefore, the therapist will need to do much of the talking, because if you're talking about it was the key, it would have worked long ago.
I hope this is helpful.

See this link for some insight into your question:
https://www.apa.org/topics/anxiety-disorders#:~:text=Psychotherapy%20for%20anxiety%20disorders%3A%20What%20to%20expect&text=Psychologists%20sometimes%20use%20other%20approaches,and%20providing%20patients%20with%20support.