Final answer:
The most likely beetle species found on walls in Amman, Jordan, are the red flour beetle and the confused flour beetle. The correct answer is option D).
Step-by-step explanation:
To identify the most likely beetle species found on walls in Amman, Jordan, based on the provided description, we need to consider the common characteristics of beetles in the region. Both the red flour beetle (Tribolium castaneum) and the confused flour beetle (Tribolium confusum) are known as pests in pantries and places where dried food goods are stored.
These beetles are often found in homes and can be confused with one another due to their similar appearance. Meanwhile, the foreign grain beetle (Ahasverus advena) typically infests grain that has a high moisture content, which might be less common in households.
In the absence of specific characteristics described in the question, it is more likely that the beetles found on walls in a home environment in Amman would be either the red flour beetle or the confused flour beetle, not the foreign grain beetle. Answer D) Both red and confused flour beetles would therefore be the most probable choice.