How does knowing past history impact our understanding of events?? please i need help with this question! please answer this seriously!

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases

What policy did "jim crow" laws put in place? black codes integration segregation 2. the supreme court case that established the doctrine of "separate but equal" was dred scott v. sandford plessy v. ferguson brown v. board of education 3. the supreme court case that overturned the doctrine of "separate but equal" wasdred scott v. sandford plessy v. ferguson brown v. board of education

Using your time line, your analysis of images from the library of congress’s website, and your textbook, write a letter of 3-5 paragraphs for a time capsule to be opened in 200 years that describes the characteristics of texas from the time of the civil war to the late 1800s. be sure to include information on texas’s government, economy, and people. be sure to use specific evidence to support your writing. cite your textbook using specific page numbers, as well as any images you describe. edit your work for proper grammar, punctuation, and spelling before submitting. hurry im short on time