Final answer:
The great contrast in what happens to the family just at the time of harvest is the abundance of food and famine.
Step-by-step explanation:
The great contrast that happens to the family just at the time of harvest is a) Abundance of food and famine.
The dearth described in the referenced information caused scarcity of food during the harvest season. Despite the heavy rains in summer, the grain could not ripen properly, resulting in a lack of nourishing bread. This affected both the poor and the rich, as even large quantities of bread could not satisfy hunger. The contrast between abundance and famine is evident in the disparity between the usual harvest season and the scarcity experienced during this time.