A parasite is a type of a symbiont.
Parasitism describes a relationship between two organisms where one benefits, and the other is harmed. The parasite is the organism that benefits from the relationship, while the host is harmed by the relationship. Parasites can be a number of things including plants, animals and even viruses and bacteria.
Well part of the water cycle is evaporation which come from heat which you get from the sun. When the water evaporates it goes into clouds so then it can rain.
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Growth is needed for reproduction and reproduction is need for growth so you could say that they are dependent upon each other