Name the host and the site where the following occur in the life cycle of a malarial parasite :
(a) Formation of gametocytes.
(b) Fusion of gametocytes.

Explanation

To answer the question regarding the life cycle of the malarial parasite (Plasmodium), we need to identify the host and the site for two specific events: the formation of gametocytes and the fusion of gametocytes.

### Step-by-Step Solution:

1. **Identify the Host for Formation of Gametocytes:**
- The formation of gametocytes occurs in the human host. Specifically, it takes place in the red blood cells (RBCs) of humans.

2. **Identify the Site for Formation of Gametocytes:**
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