In a world where shadows are solid and can interact with the environment as if they were physical objects, Keiji casts a shadow on a wall due to a light source opposite him. Yara, who is sensitive to touch, is standing close to the same wall. What happens to Yara's shadow when Keiji walks toward the light source, and how does it affect Yara? Respond very briefly.
As Keiji moves closer to the light source, his shadow on the wall becomes larger because the light source creates an enlarged projection of Keiji's form on the wall behind him. Since shadows in this world are solid and can be felt as if they were physical objects, Yara's shadow, which is also on the wall, will come into contact with Keiji's enlarging shadow. As Keiji's shadow grows, it will begin to overlap with Yara's shadow. When this overlap occurs, Yara will feel the sensation of something touching her because her shadow is sensitive to contact just like her physical body. As Keiji continues to approach the light, his shadow will continue to expand and apply pressure to Yara's shadow, intensifying the sensation Yara feels, as if a larger or heavier object is pressing against her.