Tachy- is the prefix it means fast so tachycardia is a rapid heart beat
Hope this helps :)
The theory that focuses specifically on the relationship between a child's stage of development and how the child thinks was developed (D) Piaget.
Explanation:
<u>According to the Jean Piaget's theory of cognitive development children's move through four different stages of mental development. </u>
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<u>Piaget theory is based on the understanding of how children acquire knowledge about the world around them ,and it also involves understanding the nature of their intelligence.</u>
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<u> He does not support the fact that intelligence is a fixed triat rather he advocate the fact that cognitive development is an outcome of biological maturation and interaction with the environment.</u>
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A. younger teen boys are starting to build testosturone and dont know how to control it
