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<p id="first">
  Web design encompasses many different skills and disciplines in the production and maintenance of websites.
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<p id="second">
  The different areas of web design include web graphic design; user interface design (UI design); authoring, including standardised code and proprietary software; user experience design (UX design); and search engine optimization.
</p>

#first {
  width: 75%;
  margin: auto;
}
#second {
  width: 75%;
  margin: 10px auto 0px;
}

#first {
  width: 75%;
  margin-left: auto;
}
#second {
  width: 75%;
  margin-right: auto;
}