Vertebrates have a back bone. They have living endoskeleton, pharnyx and efficient respiration, advanced nervous system, and paried limbs.
Sample Answer:
The windsurfer, his board, and the air and water around him are all made of matter. All matter is made up of very small particles called atoms, which cannot be divided.
Answer:
sinusitis
Explanation:
Sinusitis is defined as the swelling or inflammation of the linings of the tissue of sinuses. It is a condition where the cavities where the nasal cavities swells up.
The healthy nasal cavity or sinuses are always filled with air. But sometimes they get blocked and then they are filled with a fluid where bacteria germs grow and causes infection. This causes swelling up of sinuses cavities and a lot of pain is experienced by the person.
Other symptoms are runny nose, headache, nasal congestion and facial pain.
I think this would be the environment. That's my guess
