Question

what happens when cornfields become flooded? add the effect to the chart.
cause
powerful rainstorms flood the cornfields.
effect
?
farmers must wait longer to plant their corn.
farmers have to grow plants other than corn.
farmers need more water to keep the corn alive.
farmers have trouble selling their corn.

Explanation:

When cornfields are flooded by powerful rainstorms, the soil becomes too wet and unsuitable for planting immediately. So farmers have to wait for the soil to dry out enough, meaning they must wait longer to plant their corn. The other options don't logically follow: growing other plants isn't a direct immediate effect of flooding for planting timing, needing more water is incorrect (flooding provides excess water), and trouble selling corn is more related to market/quality issues not direct planting - timing effect of flooding.

Answer:

Farmers must wait longer to plant their corn.