GEOLOGY

Detailed explanation-1: -Explanation: Tsunami is caused due to disturbance caused by deep down the sea. Lightening will not cause any disturbance for the sea whereas earthquakes, A major nuclear explosion undersea and Volcanic eruption can cause a disturbance in the sea.

Detailed explanation-2: -A tsunami is a series of enormous waves created by an underwater disturbance usually associated with earthquakes occurring below or near the ocean. Volcanic eruptions, submarine landslides, and coastal rock falls can also generate a tsunami, as can a large asteroid impacting the ocean.

Detailed explanation-3: -It is not likely to occur in case of lightning, because lightning is an electric spark caused by the accumulation of charges in clouds.

Detailed explanation-4: -Earthquakes. It can be generated by movements along fault zones associated with plate boundaries. Landslides. A landslide that occurs along the coast can force large amounts of water into the sea, disturbing the water and generate a tsunami. Volcanic Eruption. Extraterrestrial Collision.