Earmuffs can be for one of two purposes: first, to keep your ears warm and second, to protect your ears from loud noises.
Warming earmuffs are usually soft and fluffy and are worn in very cold areas. Protective earmuffs are made mostly from plastic, and are worn by people who operate heavy, noisy machinery or work in very loud areas.
An earthquake is a sudden release of energy under the Earth's surface, like a sudden cracking along a fault line. Earthquakes can sometimes be caused by volcanoes. Earthquakes can cause severe shaking of the ground, which makes building buildings fall down and roads and bridges to crack and break.
Earwigs are a very common insect found all over the world. They eat ripe fruit, trash, other insects and the young shoots of plants.
They get their name because a long time ago people beleived that earwigs crawled into people's brains through their ears to lay their eggs. Earwigs do like hiding in warm, dark, damp places so it is possible they will hide in people's ears if they have the chance.