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I really need help on this question!-example-1

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Answer:

D. in the same direction as they are moving

Step-by-step explanation:

There are two types of waves as follows:

1. LONGITUDINAL WAVE:

Such types of waves, in which particles of the medium vibrate along the direction of propagation are called ‘Longitudinal Waves’. For example; sound waves, and waves produced in spring. Longitudinal waves consist of compressions and rare fractions.

2. TRANSVERSE WAVE:

Such waves in which particles of the medium execute perpendicular motion to the direction of propagation, are called ‘Transverse Waves’. For example; waves produced in water, light waves, and radio waves. Transverse waves consist of Crests and Troughs.

Therefore, the correct answer is:

D. in the same direction as they are moving

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