Answer: c
Explanation: I think the answer will be c
5. The brown horse and I came to a metal stairway
Both of these stories are very similar in terms of their tone, format and style. There are several characteristics that demonstrate this. In terms of their tone, both stories adopt a solemn tone when speaking about matters of cultural importance, such as Rainy Mountain. This emphasizes the significance that such objects and places have for the American Indian cultures.
In terms of their format and style, both stories employ a narrative style. However, we can perceive that this tone is not only entertaining, but also informative. Both stories want to educate readers about the cultures and the events that led to their development.
Water!
Photosynthesis produces sugar and oxygen, and doesn't require or produce carbon, thus it must be water.