Contrast is important when designing a web page for many reasons. One of the most important reasons is because if you don't have contrast, you won't be able to read what is written on the page. Your eyes will have to strain really hard or it just simply won't be possible to read at all. Another really important reason is that contrast makes the web page look visually appealing. Whereas, if you don't have contrast it is all kind of jumbled together. As you can see there is a plethora of reasons contrast is important.
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She could volenteer at a day care at the weekend or study child development/care whilst she is still at school.
Composed of more than 1 simple machine
Virtualization. To enable easy deployment and scalability, it should be easy to spin up new machines on request. Virtualization offers the possibility to clone operating systems and deploy solutions independent of the actual hardware.