7. If a hardboiled egg is cracked, the cracked egg shells could be an example of *

-the core
-tectonic plates

-the mantle
-the atmopshere

➕❎➕➕➖➗❌✖✔❗❗❗❗❗❗i dont understend you

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).

did you figure it out? i need on this same question