Final answer:
If Malinda cannot do a pullup or burpee in gym class, Herbert Sheldon would most likely describe her as an endomorph.
Step-by-step explanation:
If Herbert Sheldon were to assess Malinda's body type based on her inability to do a pullup or burpee in gym class, he would most likely describe her as an endomorph. Endomorphs tend to have a higher percentage of body fat and struggle with activities that require strength and agility.
Although Malinda does not gain weight easily, her inability to perform certain exercises suggests that she may have a higher percentage of body fat or less muscle mass. This aligns with the characteristics of an endomorph.
It is important to note that body types are generalizations and individuals may exhibit characteristics from multiple body types.