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.
Best Answer: Snails are gastropods (which means stomach-foot), which are a type of mollusk (Phylum Mollusca). This puts them in the same phylum as clams and squid. Snails and other gastropods make up about 80% of the described species in this phylum. Almost all members of this group live underwater, with a few snails and slugs being the only terrestrial species. Bugs, on the other hand, are a type of insect. This puts them in Phylum Arthropoda. Both of these groups are in the animal kingdom.