Question

on a patch of desert - clay in california, there are rocks that mysteriously move, leaving visible tracks. the land is extremely flat, so the rocks are not rolling downhill. how can their movement be explained? one possibility, since heavy rainfall occasionally floods the area, is that the rocks are moved by ice. according to this hypothesis, when the temperature drops, a sheet of ice forms on top of the shallow pool of water, freezing the rocks in place. then, as the temperature rises, the ice sheet becomes free - floating and moves around on top of the water, taking the rocks with it. the water would have to be shallow enough so that the rocks would scrape the clay bottom and leave tracks as they move. the primary purpose of the passage is to suggest a solution to an uncommon problem summarize the issues of concern regarding a natural process present an explanation for a puzzling phenomenon evaluate evidence of an unlikely occurrence read the passage below from, the giver, by lois lowry. jonas, a 12 year old boy, has just been named the new receiver of his community. this means

Explanation:

The passage starts by presenting a puzzling phenomenon (rocks moving mysteriously in a flat - desert area) and then offers an explanation (movement due to ice formation and melting). It doesn't suggest a solution to a problem in the sense of fixing something, nor does it summarize concerns about a natural process or evaluate evidence.

Answer:

C. present an explanation for a puzzling phenomenon