She reads a book change into negative

Witch one is it soo it the the question b.a,b,c,d

Most tornadoes carry winds speeds in a range of km per hour

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed