Write the noun clause in each sentence. then, label the clause subject, direct object, predicate nominative, or object of a preposition.

1. locusts fly in large swarms and devour whatever crops lie in their way.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

i have a basic answer but if you want a more in depth