Here are the correct forms of the given words:

1. Some countries are **overpopulated** but lack of many things. (POPULATE)
2. In some countries, giving birth of women in remote areas is **controlled**. (CONTROL)
3. Hot and cold weather **affects** people in different ways. (EFFECT)
4. This professor explained his ideas with great **clarity**. (CLEAR)
5. Since the end of World War II, **industrialization** has been increasing very fast throughout the world. (INDUSTRY)
6. Scientists consider it a **belief** that gods create volcanic eruptions. (BELIEF)
7. Women nowadays are **freer** in the endless cycle of child bearing and rearing. (FREE)
8. The mother of the child hurried **breathlessly** to her neighbourhood drugstore. (BREATH)
9. The launch of the space **function** rocket was delayed because the fuel system was faulty. (FUNCTION)
10. Her collection of medals is extremely **valuable**. (VALUE)
11. We all think what a **skilled** player Pele is. (SKILL)
12. My attempt to lose weight by running was a **failure**. (FAIL)
13. The young girl's fifth performance was completely **unexpected**. (EXPECT)
14. George's fifth jump was **successful** after four **failed** failures. (SUCCEED)