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Fill in the blank with appropriate words.
(i) Major cuases of biodiversity losses called as………..
(ii) Amazon rain forest is being cut and cleared for cultivating ………. Or for conversion of grassland for raising……….
(iii) Passenger pigeon has been become extinct due to............
(iv) When a species becomes extinct the plant and animal species associated with it in............ way also become extinct.

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### Step-by-Step Text Solution: 1. **Statement (i)**: The major causes of biodiversity losses are called as **"Evil Quartet."** - Explanation: The term "Evil Quartet" refers to four significant factors contributing to biodiversity loss, which include habitat loss, over-exploitation, alien species invasion, and climate change. 2. **Statement (ii)**: The Amazon rainforest is being cut and cleared for cultivating **"soya bean"** or for conversion of grassland for raising **"beef cattle."** - Explanation: The Amazon rainforest is often cleared for agricultural purposes, primarily for the cultivation of crops like soya bean and for raising livestock, particularly beef cattle. 3. **Statement (iii)**: The Passenger pigeon has become extinct due to **"over-exploitation."** - Explanation: The extinction of the Passenger pigeon is primarily attributed to over-exploitation, where excessive hunting and habitat destruction led to its decline. 4. **Statement (iv)**: When a species becomes extinct, the plant and animal species associated with it in **"obligatory"** way also become extinct. - Explanation: Species that have a close ecological relationship with the extinct species, often relying on it for survival, will also face extinction.
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