saving the sand dunes

we were learning about the sand dunes and how to look after them.sand dunes protect us from the waves and the sand.they talked about plants and what they do.I can care for the sand dunes by no walking on the dunes.I can tell you that the only poisons spider in new Zealand lives in new Brighton beach sand dunes. We got to make mini sand dunes we got to put shells on it but we could not pull anything that was alive out of the sand dunes.I learnt not to walk on the sand dunes and instead  walk on the step because it ruins the sand dunes.Do you have sand dunes at your beach?Do you have spiders at your beach?Do you live near a beach?Is there plants at your beach?