Final answer:
During the Little Ice Age, globally mild and warm climates deteriorated due to factors such as volcanic eruptions, changes in ocean circulation patterns, and shifts in the earth's orbit. These events led to a decrease in mean global temperature, glacier growth, prolonged droughts, and widespread famines.
Step-by-step explanation:
The causes of the deterioration of globally mild and warm climates can be attributed to multiple factors, such as changes in ocean circulation patterns, shifts in the earth's orbit, and volcanic eruptions.
During the Little Ice Age, there were several massive volcanic eruptions that released sulfate particles into the atmosphere, reflecting solar energy back into space and resulting in a decrease in mean global temperature.
This period of global cooling led to an increase in glacier growth and widespread droughts, which had a detrimental effect on agriculture and caused famines.