Answer:
One fact that I found out during my research was that some cells have the ability to move their flowers in the direction of the Sun while others do not. Sunflower and other flowers which belong to the family Asteraceae show such kind of behaviour. These flowers might have a random orientation at night. But at the time of morning, they turn east towards the sun and follow its direction throughout the day.
Here is the answer to the given question above. Based on the given sample sentences, the best way to combine the sentences using a semicolon would be this: <span>The world’s nations must cooperate; one nation cannot solve the world’s problems by itself. The correct answer would be the second option. Hope this helps.</span>
Music is the root word for musician. :)