The aspect of fiction that realist writers use to advance the plot of their story would be : The complexity of the characters.
Realist writers tend to advanced the plot by somehow explaining the motives that influence each characters, creating a tension and plot based on our human understanding and empathy
Do you mean in the Soviet flag? If so here is your answer.
Answer: Communist symbol, hammer for industrial labors, and the sickle stands for the peasantry.
The Portuguese were among the first Europeans to explore the
seas beyond Europe. Henry the Navigator urged his father, King John I, to
conquer the port of Ceuta in Northern Africa. He also sponsored the development
of the Caravel, a sailing ship that is lighter and faster than most ships at
that time. Use of caravels enabled sailors to travel further and with more
provisions, and the light draft enabled Portuguese sailors to explore shallow
rivers and waters. He also sponsored explorations to Madeira, Azores, and West
Coast of Africa.