The plants or animals in which the parasites live for nourishment are called_______

Explanation

**Step-by-Step Solution:**

1. **Understanding the Concept of Parasites**: Begin by recognizing what a parasite is. A parasite is an organism that lives on or in a host organism and gets its food at the expense of its host.

2. **Identifying the Host**: The organism that provides nourishment to the parasite is known as the host. The host is where the parasite resides and from which it derives its nutrients.

3. **Effects on the Host**: Understand that while the parasite benefits from the host, the host often suffers negative effects, such as nutrient depletion and diseases.

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