Fish don't have ears we can see but they have ear parts inside their heads. They pick up sounds in water through their bodies.
Answer: B and C
Explanation: Both are below 6 on the scale so their not as hard or tough.
Collagen is the structural protein found in skin and connective tissue. This protein is the most abundant protein, that makes up one-third of the protein in the human body. The function of this protein in the skin is to give the skin strength and elasticity, and to replace dead skin cells. In connective tissues it s<span>upports structures and anchor cells to each other.</span>
The parts wich are derived from these three areas include:the cerebellum,the brain stem of the brain stem consists of the parts:the midbrain,bridge brain,the medulla oblongata.other parts of the brain including the thalamus,hypothalamus and limbic device.
