Question

Give reason for animals, plants and human beings dependent on their immediate surroundings

Answer 1

Plants, animals and human beings are interdependent on each other and surroundings as plants produce O2 (Oxygen) for humans and we produce CO2 (CarbonDioxide) for them and herbivores animals eat plants and carnivores eat herbivores and omnivores eat carnivores and when dead ate by scavangers and converted again into nutritions and chain goes on ... 

Answer 2

Yes it is very true all plants, humans and animals are dependent on the surroundings. The surrounding or condition in which plants, human being and animals live in or operate which greatly contributes to their survival is known as environment. 
For plants, animals and human beings to survive they must interact with the environment which is made up of living organisms and nonliving components. This system of interacting living organisms and nonliving components form what is known as the ecosystem. 
Plants and animal must coexist to be able to survive and produce furture generations. 
They depend on each other because plants produce what animals and humans need and vice versa.  
Even the food chain itself is part of the environment and this therefore means that all plants, animals and humans depend on their surrounding.