<span>a cone formed around a volcanic vent by fragments of lava thrown out during eruptions.</span>
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Answer:
They act as barriers whereby wind deposits its load to come up with major land forms in the desert.
Explanation:
Sand dunes retain the load that arises as a result of erosion processes ,and disposition.
Wind deposits con form hills and sand sheets .
An example of this is in California , whereby Sand dunes make up to 25 % of the land-forms in the arid areas .
Sand dunes can also influence the formation of oases , as a result of wind action.
Just about every rocky shoreline in the Galapagos Islands is home to the marine iguana.
These lizards are found throughout the islands, and have population concentrations of up to 4,500 individuals per mile. Their total population on these islands have been estimated to be between 200,000 and 300,000.