why humans can't completely live without all other animals

Humans are an integral part of an ecosystem that includes various forms of life, including other animals. The interdependency within ecosystems is complex, and without other animals, humans would face a number of significant challenges:

1. Food Chain Disruption: Many animals are part of the food chain, serving as a food source for humans or other animals. Without them, ecosystems would be severely disrupted.

2. Pollination: Many plants, including those we rely on for food, depend on animals for pollination. Without bees, butterflies, and other pollinators, agricultural production would be drastically affected.

3. Decomposition and Nutrient Cycling: Animals play critical roles in decomposition, helping to recycle nutrients back into the soil and maintaining soil fertility, essential for agriculture.

4. Pest Control: Some animals naturally control populations of pests that could otherwise devastate crops or spread diseases.

5. Biodiversity and Ecosystem Health: Biodiversity contributes to the resilience and health of ecosystems. A lack of animal diversity can make ecosystems more vulnerable to disease and environmental changes.

6. Economic Impact: Many industries, such as fishing, livestock farming, and tourism, are dependent on animals. Their absence would have severe economic repercussions.

7. Medicine and Research: Animals are used in medical research to develop new pharmaceuticals and treatments, contributing to human health and well-being.

8. Cultural and Emotional Value: Animals also have cultural significance and provide emotional benefits, enriching human experiences and contributing to mental health.

9. Indicator Species: Some animals serve as indicators of environmental health, helping scientists monitor and understand ecosystem changes.

10. Ethical Considerations: From an ethical standpoint, many people value the intrinsic rights of animals and believe in coexisting with them.

In summary, the interconnectedness of life on Earth means that humans cannot thrive without considering the role of other animals in maintaining the balance and health of the planet.