Final answer:
True, Emmy van Deurzen's contributions to the field of existential therapy in the UK through her writing and teaching are significant, aligning with existentialist principles and impacting psychotherapy.
Step-by-step explanation:
The statement that Emmy van Deurzen has made significant contributions to the development of existential therapy in the United Kingdom through her writing and teaching is True. Her work has been influential in shaping the understanding and practice of existential therapy. Van Deurzen's approach has been associated with the existentialist view that emphasizes the acceptance of the role of human emotions in shaping experience and has contributed to the broader therapeutic community's recognition of the importance of existential themes in psychotherapy.