Answer:
Monkey Glacier and Happy Glacier had a net retreat over the 10 years.
Step-by-step explanation:
Monkey Glacier and Happy Glacier have had a retreat from their liquid in recent years, as have all glaciers. This occurs for many reasons such as common evaporation that happens naturally, the erosion that the wind causes in the glaciers, but mainly because of the progressive increase in the temperature of the planet that has increased the levels of evaporation intensely, causing the glaciers lose more liquid than normal.