Sound waves cannot travel through a vacuum. This is because sound waves move by actually compressing molecules--therefore in a vacuum it would be impossible for sound to travel. This is also why no sound can be heard in space.
Answer : Limestone that began as coral reefs can be found on the continents.
option c is the answer of your question
A major change in the virus can occur that is called Antigenic Shift.
A commonplace viral infection that can be deadly, specifically in high-risk agencies.The flu assaults the counter lungs, nostrils, and throat. young youngsters, older adults, pregnant girls, and those with a chronic disorder or weak immune structures are at high hazard.
Signs and symptoms encompass fever, chills, muscle aches, cough, congestion, runny nose, complications, and fatigue. The flu is handled over the counter with rest and fluid to permit the over-the-counter body to fight over-the-counter infection on its personal. pain relievers may assist with signs and symptoms.
An annual vaccine can help save you from over-the-counter flu and restriction its headaches. muscle or body aches. headaches. fatigue tiredness a few people may also have vomiting and diarrhea, though that is extra common in kids than adults.
Learn more about the influenza virus here;-brainly.com/question/16363422
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