In an earthquake-prone area, it has been many years since the last earthquake along a fault. should residents be concerned about a future earthquake? explain.

Yes, residents living in an earthquake-prone area should be concerned about a future earthquake, even if the last earthquake had been many years before. Remember, an earthquake-prone area is an area that has frequent earthquakes (earthquakes that happen all the time). So, even if an earthquake hasn't happened in a few years, it doesn't mean that it won't happen again. If you live in an earthquake-prone area, make sure to always have emergency supplies with you at all times, and in case of a major earthquake, stay with an adult, and make sure that you have water and food.

~Hope I helped!~

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.

Answer : romans built laws to manage the pollution which was lead by smoke produced by the factories.

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.