Centering a block or image. Sometimes it is not the text that needs to be centered, but the block as a whole. Or, phrased differently: we want the left and right margin to be equal. The way to do that is to set the margins to 'auto'.In case of a browser, that means the browser window). So centering an element in the viewport is very simple. Here is a complete example. (This example uses HTML5 syntax.). You can see the result in a separate document. The 'margin-right: -50%' is needed to compensate the 'left: 50%'.
Slugs and snails share many similar features. However, the most apparent difference between the two is that snails carry coiled shells on their backs whereas slugs do not contain these shells. A shell of snail is composed of calcium carbonate and it keeps growing with the growth of snail.Both produce mucous for retaining the moisture.owever, the most apparent difference between the two is that snails carry coiled shells on their backs whereas slugs do not contain these shells. A shell of snail is composed of calcium carbonate and it keeps growing with the growth of snail. Both produce mucous for retaining the moisture.
Snails and slugs are the only gastropods that can also be found on land. The majority of snails and slugs, though, live in water. The most obvious difference between snails and slugs is the fact that snails have shells. A snail âs shell is like a home it carries around on its back. Slugs, on the other hand, have no shell. Otherwise, snails and slugs are remarkably similar. Their only other differences are in habitat and behavior, but these differences are the result of the fact that snails have shells and slugs donât.