This is a simile as it compares two things using the word like. It compares her running across the grass to a cheetah chasing its prey, implying she is running very fast
I believe the answer is A (fear) or if you wrote the answers in a different order A,B,C,or D but the answer will be fear because in the excerpt is says:''I was stunned'' and it also says ''<span>How could we let Father go to such a fate?''
Hoped my answer helped :)</span>