In parasitism, the organism that is is called the while that which is harmed is called the

Host - suffers
Parasite - benefits

Parasitism is an ecological relationship that occurs when an organism benefits from the obtained resources of the host. While the parasite benefits from the captive and absorbed resources, the host suffers from the declining amount of resources. 

The organism that is helped is called the parasite , the organism which is harmed called the host

What have scientists learned about plant behavior by studying the dodder plant

Go into your kitchen and get some water or coolaid and warm up at hot dog