Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved by groundwater circulating through them. As the rock dissolves, spaces and caverns develop underground.
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.
Answer: Here you go one advice
I think that Gina should spend it on her college fee instead of a car because college are expensive but after college she could by a car.
There are three meanings.
1. the process or fact of isolating or being isolated.
2. denoting a hospital or ward for patients with contagious or infectious diseases.
3. an instance of isolating something, especially a compound or microorganism.
Asia is called a subcontinent because it is very large land and it is separated from other countries by water.
