Based on the desert food chain provided, a change in the ecosystem which would have the greatest negative effect is: D.) A drought that kills most of the grass.
An ecosystem can be defined as a biological community or space that comprises all living organisms (biotic factors) and the physical environment (abiotic factors) with which they interact.
Basically, an ecosystem provide the following essential services that are very vital for the sustenance of life for all living organisms;
In an ecosystem, producers refer to the living organisms capable of manufacturing their own food and can provide energy or food for other living organisms (consumers) in a food chain.
This ultimately implies that, producers are typically the foundation of a food chain and are always found at the top (first layer) of the food chain.
In this desert food chain, grass is the producer and are key for the survival of the other living organisms i.e the grasshopper, mouse and owl.
Hence, a drought that kills most of the grass is a change in the ecosystem that would have the greatest negative effect on the other living organisms (grasshopper, mouse and owl).
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