While hiking through the ural mountains, asia decided to use a walking stick to facilitate her climb. the best definition of the word that is underlined in the sentence above is a. to get in the way of reaching her goal in a timely manner b. to make the journey more difficult c. to avoid the harder parts of the hike d. to support her walk

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