The life cycles of parasites are often complex , involving one or two intermediate hosts or vectors to facilitate parasitisation of its primary hosts. (True/False)

Explanation

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement claims that the life cycles of parasites are often complex and involve one or two intermediate hosts or vectors to facilitate the parasitization of primary hosts.

2. **Defining Key Terms**:
- **Primary Host**: This is the main host in which the parasite reaches maturity and often reproduces.
- **Intermediate Host**: This is a host in which the parasite undergoes development but does not reach maturity. It may be necessary for the parasite's life cycle.
- **Vector**: This is an organism that transmits the parasite from one host to another.
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