To determine which of the following is an extinct species, we need to analyze each option provided:
1. **Snow Leopard**: This species is classified as vulnerable, which means it is at risk of extinction but is not yet extinct.
2. **Sea Mink**: This species is known to be extinct. The sea mink was a marine mammal that lived along the northeastern coast of North America and has not been seen since the late 19th century.
3. **Water Hyacinth**: This plant is not extinct; in fact, it is considered an invasive species in many regions, including parts of India, where it is known as the "terror of Bengal."
4. **Low Entailed Macule**: This species is classified as endangered, which means it is at risk of extinction but still exists.
Based on this analysis, the extinct species among the options is the **Sea Mink**.
**Final Answer**: The extinct species is the **Sea Mink** (option B).
To determine which of the following is an extinct species, we need to analyze each option provided:
1. **Snow Leopard**: This species is classified as vulnerable, which means it is at risk of extinction but is not yet extinct.
2. **Sea Mink**: This species is known to be extinct. The sea mink was a marine mammal that lived along the northeastern coast of North America and has not been seen since the late 19th century.
3. **Water Hyacinth**: This plant is not extinct; in fact, it is considered an invasive species in many regions, including parts of India, where it is known as the "terror of Bengal."
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