Answer:
When it comes to crickets, fitness means one's reproduction in producing as many offspring as possible, so the chances of their offspring living are higher. In addition, the passing on their genes is the most important for their offspring's evolution.
Weathering and erosion are similar in that they both work together to change and shape the Earth's surface. While weathering breaks rock and earth down, erosion is the displacement of the pieces and particles of rock and earth.
Nutrient pollution is the situation when due to the excess nutrient levels, excessive amounts of algae grow - so the correct answer is c. excess fertilizer use.
Pouring motor oil down the drain also results in pollution, but in other kind of solution - not nutrient solution.
