The reflection on a bathroom mirror, the lake, and the glare on a pair of glasses are caused by which type of reflection?

Specular reflection

The correct answer is option 2. Specular reflection.

The reflection on a bathroom mirror, the lake, and the glare on a pair of glasses are primarily caused by specular reflection.

Specular reflection occurs when light reflects off a smooth surface at a definite angle, resulting in a clear and well-defined reflection. This type of reflection is responsible for producing sharp images, such as the reflection you see in a mirror or on the surface of a still body of water like a lake. Additionally, the glare on a pair of glasses is typically caused by specular reflection from light sources or other reflective surfaces.

While multiple reflection, glossy reflection, and diffused reflection may also play roles in certain scenarios, the specific examples you mentioned are best described by specular reflection due to the clear and distinct images produced.