Answer:
They'll form a mesh that plugs what ever injury. The platelets can change its round shape to a spiny shape and will release substances that entrap more platelets. Proteins will enlargen and become a Blood Clot.
1. Chemical weathering
2.Biological weathering
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Of course, elephants are known to use low sound waves to communicate far away and bats are known to use echolocation to find prey and avoid obstacles.
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