Please help me fast Please complete sentences please

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Explanation:

They developed many new techniques for buildings and construction of all types including the invention of concrete, Roman roads, the invention of Roman arches, and incredibly well-built aqueducts that ran for miles before they reached the end and delivered fresh water.

elizabeth loftus conducted a study to observe the reliability of eyewitnesses during the 1970s. their baseline was to define how accurate are the recollections of eyewitnesses.

her studies do not support the use of eyewitness. loftus mentions in her work that we are not required to recall some experiences, meaning that rarely an individual eyewitness testimony is trustworthy. a good example is presented in her work, where all individuals watched a video and were than asked "about how fast were the cars going when they hit/smash? ". the testimonies changed based on the word she used to make the question (hit or smash), proving the fragility.