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Answer:
D. By adding the vectors

Explanation:
Given
Represent the velocity of the river current as VR

Represent the velocity of the boat as VB

Required
How to calculate the velocity of boat relative to river current
From the question, we understand that both move in the same direction.
So, the relative velocity V is calculated as:



Notice that the both velocities are added together to get the relative velocities.
This is so because they both move in the same direction
<em>From the list of given options, only option D is correct.</em>
Explanation:
1. Communication is the process of sending/transmitting information from one place to another.
2. Or simply the process of giving and receiving information
This example might illustrate the concept of interaction. This may mean that after the first meeting, they may again and learn more about each other, so the early impressions they formed will influence their feelings about each other in the future. His feelings towards her are influenced by how he knows her now.