Answer: B
Explanation: Osmosis is the movement of water through a semipermeable membrane according to the concentration gradient of water across the membrane, which is inversely proportional to the concentration of solutes.
Answer:<u> Option D
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Solar panels contain a very expensive element, i.e. silicon. This element is able to convert the solar energy into electric energy. The cost of the solar panel gets expensive because of this rare element. It is found in limited areas of the world. That’s why option D is correct. Coal is not used in solar panel, so option B is incorrect. Neither is wind energy, so option A is also incorrect. Water is also not used for exploiting solar energy, which makes option C a wrong answer.
The correct answer would be D) An observation that has a number associated with it.
During a lunar eclipse, the Earth gets in between the sun and the moon
<span>Actually some of the important causes for the age related drop in female fertility is due to some chronic bad habits like chain smoking, regular alcohol intake and taking big dose of drugs, and also due to wrong diet or junky bad food habits, then mainly its due to hormone imbalance problems.</span>
