Water would be the correct choice in word
Answer:
Sphagnum is a genus of the Phyllum Bryophyta. It is commonly called as peat moss. A sphagnum grows in a wetland of marshes. These mosses store large amount of water. When these plants die in the wetland, the hard remains left after decomposition is a main source of soft coal reserve called as peat.
Flows through a system :)
A reproductive barrier preventing interbreeding because the two species mate during different times of the year is called a temporal isolation. It basically means being isolated in time. It is a mechanism in which two species cannot mate since their mating seasons are at different period of time. For example the American toad breeds early in summer season. On the other hand, the Fowler toad would mate late in summer season. Due to this difference, they are prevented to interbreed.