Which of the following is an example of complex system one with many parts and many variables
a food chain
b a simple machine
c a diagram
d the atmosphere

Food chain

Explanation:

Food chain can be defined as a complex system as it has many variable (different types of animals) and different parts (different tropic level).

The food chain starts from the producers and then the food is eaten by primary consumers. The primary consumers are eaten by secondary consumers.

There are many animals at different tropic levels and there is a unidirectional flow of energy from the producers to the consumers.

Hence, a food chain can be considered as a complex system with many parts and many variables.

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b