In world war 1 What did the British develop to help overcome the layout of the trenches

answer; ok in rural area most people depend on private transportation(cars),pick up truck,donkey and buggy: ),and urban people can walk or ride public transportation,bus,train cab,uber.

well since twins have about the same dna they dont have one think in common which is the figer print. nobodys fingerprint is the same. if your using twin you would most likely get around the same results for both of them because of the genetics.. i hope this