Answer:
Its B so i think its c
Explanation:
The narrator describes stuff and what people do so it would be he her she
Systems theory describes the nature of system as interrelated and interdependent parts that is either man-made or natural made. Every system can be influenced by the environment, where change takes place, pattern may be a contributing factor and unpredictable things happen.
our neighbours have a cat.
The third one, it’s the most detailed one and actually gives an explanation on the topic