Question

1. look for clues about the authors purpose in this passage about mars.

in the spring and summer, some areas of the martian surface darken and turn a greenish - blue hue. in autumn and winter, the same areas turn a yellowish - brown hue. the best time to observe these changes is when the white polar caps start to melt. at this time, the martian dark areas remind one of earths moist soil.
what is the authors purpose in writing this paragraph?
to inform the reader about some basic facts regarding the planet marsto persuade the reader that it would be wonderful to travel to marsto inform the reader why life on mars is still considered highly unlikelyto persuade the reader that mars should be explored in future space missions

Explanation:

The passage presents factual information about the Martian surface's color changes in different seasons and the best time to observe these changes. It does not try to persuade the reader about traveling to Mars, the unlikelihood of life on Mars, or future exploration. It simply informs about basic facts regarding Mars.

Answer:

to inform the reader about some basic facts regarding the planet Mars