Read the underlined sentence on page 4. Which statement BEST explains how the author's word choice in the sentence contributes to the meaning of the passage? The author uses the words "investments" and "dividends" to show that children's life experiences are valuable in brain development. The author uses the words "huge" and "modest" to contrast babies' brain growth with that of adults. The author uses the phrase "at this time" to show that brain development stops after a certain age. The author uses the phrase "can deliver" to show that scientists are still unsure about what impacts brain growth.​

Arrange the sentences below to form a logical paragraph. an experienced rock climber knows that it takes a combination of knowledge and preparation to perform a successful climb. a successful climb begins with a proper foothold, carefully placing each foot on a ledge or crack then reaching for a solid hold, and finally pushing off. in addition to a proper foothold, a climber must be careful to check the integrity of the rock before stepping because it has to be solid clear through. a veteran climber judges the integrity of the rock and chooses not to climb on conglomerates, packed clay with lots of little rocks. but, such knowledge of rock is not the only preparation a skilled climber needs; equally important is the correct equipment. with these tools, knowledge of rock composition and equipment safety, a climber may experience many safe and enjoyable climbs.