What question did Yali ask Diamond that sparked Diamond’s research? What did Yali’s question mean?

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Idk bro sorry  lava is hotter then magma but im  not sure about it alll

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.