Answer:
Add a Picture
Explanation:
Add a picture please so I can answer it, otherwise im just going to have to guess its Moss, Algei or Bacteria lol
The answer could be (spread), but there isn't much to go on here
Reproductive isolation must happen
Normal, clean rain has a pH value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides—produced from power plants and automobiles—the rain becomes much more acidic. Typical acid rain has a pH value of 4.0.
