Describe how an increase in the elf owl population size would most likely effect( increase or decrease) three other populations size in the food web. Explain each of your answers

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.