A) Mbudzi (goat)
B) Chivala (grasshopper)
C) Mkhuku (chicken)
D) Mbira (Rat)
The answer is, they are all for food, sort of. My family eats goat, chicken, beef (not pictured), mice (not pictured) and grasshoppers. However, they haven't eaten these goats or chickens during my stay. The goats are kept in an elevated pen near the house, and the chickens sleep in a coop adjacent to the kitchen. My host brothers are raising the rats in an underground pen to sell, and they said some people eat them, but my family does not.
And the grasshopper? My host brother said he was planning to cook them and eat them today. Yum.