How does algal growth kill marine animals

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease

What is the difference between topsoil and clay?