Answer:
A duckling swimming after its mother.
Answer:
because it permits certain movement of molecules in and out of the cell
Answer:
Melting would have caused denser substances to sink toward the center while less-dense materials would have migrated to the crust.
Explanation:
Answer:
Dam and irrigation system and hydroelectric power are used in some countries.In many countries in this region technology has not been able to meet the demand for water.The desalination process is very costly to remove salt from water.
Explanation:
