Answer:
Option C
Explanation:
C= erosion and deposition
A valley is an elongated low area often running between hills or mountains which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period of time
D= glacial movement
Sinkholes are formed when the land surface above collapses or sinks into the cavities or when surface material is carried downward into the voids. Drought, along with resulting high groundwater withdrawals, can make conditions favorable for sinkholes to form
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Answer:
Iron cannot release energy either by fission or fusion.
Explanation:
When a high-mass star runs out of hydrogen inside its core, it starts burning helium, and then heavier elements until it reaches iron.
Nuclear fusion of iron cannot occur, because the amount of energy required for the fusion of two nuclei of iron is larger than the energy released.
Therefore, when all the lighter elements lighter than iron have already fuse together, the star cannot burn any other element, so the nuclear fusion inside the core stops and the star collapses on itself, producing a huge explosion known as supernova.
If global climate change causes a temperate grassland region to get less rainfall and higher temperatures, it will start to support more desert species.
Global climate change refers to long-term average changes over the whole planet. These include rising temperatures and precipitation changes, as well as the repercussions of global warming, such as: Sea levels are rising. Mountain glaciers are receding.
Climate change will most certainly impact the makeup of grassland communities, but complex interactions make forecasts difficult.
Extreme weather events can cause a swift and severe reaction, affecting both ecosystems and human groups . Droughts, floods, fires, and hurricanes are anticipated to have a greater impact on grassland ecosystems in the United States. Drought worsens soil erosion and depletes aquifers. Increased precipitation variability favors more frequent fires, that can minimize the encroachment of woody plants into grasslands.
Therefore, the blank will be filled by begin to support more desert species.
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Answer:
people form political units such as countries of states to make governing more effective.
