I believe your answer is C. incandescent bulb
The correct answer is rain forests increase greenhouse gases. I know for sure it's not the first or third answer. Rain forests are the habitats for many animal and plants but I'm pretty sure its over 50% not 30%.
The answer is Mediterranean Sea
The right word for the blank space is STABLE.
Before man started cultivating crops, he has to move around constantly in order to look for food for himself and his family. When man started cultivating crops, his wandering around stopped because, food provision is now more stable.
