Foci are specific points of interest or concentration in various fields, such as science, mathematics, and art. In geometry, for example, the foci of an ellipse are two fixed points that help define its shape. The distance from any point on the ellipse to these foci has a constant sum, which is a key property of this geometric figure. In psychology, foci can refer to the central themes or issues that individuals concentrate on during therapy or self-reflection. Identifying these foci can help in understanding personal challenges and guiding the therapeutic process, ultimately leading to better mental health outcomes.