To determine which option represents a group of autotrophs, we first need to understand what autotrophs are. Autotrophs are organisms that can produce their own food using sunlight (through photosynthesis) or through chemical processes (chemosynthesis). Common examples of autotrophs include plants, algae, and some bacteria.
Now, let's analyze each option provided in the question:
1. **Option 1: Spinach, Mushroom, Tomato, Yeast**
- Spinach: Autotroph (a plant that photosynthesizes)
- Mushroom: Heterotroph (a fungus that decomposes organic material)
- Tomato: Autotroph (a plant that photosynthesizes)
- Yeast: Heterotroph (a fungus that ferments sugars)
- **Conclusion**: This option contains both autotrophs and heterotrophs, so it is incorrect.
2. **Option 2: Tulsi, Algae, Cascota, Dordar, Mushroom**
- Tulsi: Autotroph (a plant that photosynthesizes)
- Algae: Autotroph (can photosynthesize)
- Cascota: Heterotroph (a parasitic plant)
- Dordar: Not a recognized term in this context, but if it refers to a heterotroph, it would be incorrect.
- Mushroom: Heterotroph (a fungus)
- **Conclusion**: This option also contains heterotrophs, so it is incorrect.
3. **Option 3: Algae, Spinach, Tomato, Banana**
- Algae: Autotroph (can photosynthesize)
- Spinach: Autotroph (a plant that photosynthesizes)
- Tomato: Autotroph (a plant that photosynthesizes)
- Banana: Autotroph (a plant that photosynthesizes)
- **Conclusion**: All organisms in this option are autotrophs, making this option correct.
4. **Option 4: Algae, Cascota, Dordar, Banana, Mango**
- Algae: Autotroph (can photosynthesize)
- Cascota: Heterotroph (a parasitic plant)
- Dordar: Not a recognized term in this context, but if it refers to a heterotroph, it would be incorrect.
- Banana: Autotroph (a plant that photosynthesizes)
- Mango: Autotroph (a plant that photosynthesizes)
- **Conclusion**: This option contains both autotrophs and heterotrophs, so it is incorrect.
Based on the analysis, the correct answer is **Option 3: Algae, Spinach, Tomato, Banana**, as all these organisms are autotrophs.
