EVALUATE Why is it necessary for engineering processes to be iterative, instead of following a fixed sequence of steps?
O a. It encourages engineers to skip steps that do not seem necessary when time and
budget are limited.
O b. It helps to ensure that the problem is well defined, criteria and constraints are met,
and the best solution is chosen.
O c. It encourages engineers to follow the most efficient path to a solution as possible.
O d. It ensures that no mistakes are made in any of the three main stages of the
engineering design process.

enzyme speed up the reactions

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.