Which of the following led to the greatest decline of bedbug populations in the mid twentieth century?

highly improved laundering soaps.
the use of pesticides, namely ddt.
the increased use of running water in homes.
the use of washing machines.

The answer is the increase use of running water.

Explanation:

The increased amount of water in homes allowed for washing clothes and bedding.

Option B

Explanation:

There was rise in the population of bed bug during the mid twentieth century and there was no control on them.

The use of pesticide was the one and only solution on the pests. DDT was a very effective pesticide that killed bed bugs.

DDT was banned after sometime because it entered the food chain and its level was increasing significantly at each level.

But before that it was very effective in eradicating bed bugs.

measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.