Answer: Sphincter muscles
Explanation:
The circular rings of smooth muscles, that can contract to regulate the movement of the smooth muscles that can contract to regulate the movement of food through the gastrointestinal tract are known as sphincter muscles.
These two layers are outer layer and inner layer. The outer layer is longitudinal and the inner layer is circular. They contract rhythmically to squeeze food.
Pollution and deforestation
I think the answer is C. None of the other animals are mammals.
The destructive force of the wave is not felt while they are out at the sea but it is felt when they approach the shore.
<u>Explanation:</u>
When the waves are out in the ocean they are in deeper waters. Once they move towards the shore they approach shallow waters. This movement causes shoaling of the waves by which its amplitude increases.
When the wave reaches the shore its leading edge gets slowed down by coming in contact with the beach floor but its trailing edge which is still in deep water still moves rapidly. The wave thus gets compressed and its wavelength decreases. The amplitude of the wave then increases rapidly making the wave destructive.
