C: Ecosystem 1
Because there’s not a lot of diversity in only 10 species, making it easy to wipe out the entire population.
The greenhouse gas carbon dioxide helps to D. <span> maintain warmth near Earth’s surface. This phenomenon is called global warming as part of the climate change experienced by the Earth. Greenhouse gases are trapped in the atmosphere which traps the heat that is released near the surface</span>
The type of land form that most early cultures were attracted to was riverbeds. The correct option among all the options that are given in the question is option "D". It has been seen that the earliest civilizations of Harappa and Mohenjodaro were established near the Indus river. The riverbeds were fertile and good for irrigation.