What does SOS stand for?

Read this passage.my career in journalism has taught me the challenges of capturing sporting events, yet gregor powell's descriptions are flawless. powell is a gold-medal paralympic swimmer, but his memoir proves that his true strength is the power of his insights.what feature distinguishes this passage as a foreword?

Which verb from is used to indicate the perfect progressive tense

How does the allusion to icarus support the author’s tone ? a)it makes it clear that earhart,like icarus ,fell to her death .b)it emphasizes earhart’s failure in spite of her ambition.c)it stresses that the author views earhart’s fate as a mystery.d)it shows that the author sees earhart as a kind of legend can someone