The relationship between HTML and CSS in website design

    What is the relationship between HTML and CSS in website design? What is the difference between the pilot implementation methodology and the parallel implementation methodology? What is change management? What are the four different implementation methodologies? Please answer the following question in a paragraph ( 100 -150 words) Which software-development methodology would be best if an organization needed to develop a software tool for a small group of users in the marketing department? Why? Which implementation methodology should they use? Why?