Final answer:
fossilized firewood, tree ring data, weapons, or clothing do not directly indicate dietary habits.
Step-by-step explanation:
Archaeologists can determine an ancient people's diet by examining the remains of various elements from past civilizations, except for certain items that are not directly connected to food practices. For instance, archaeologists can find evidence in fossilized feces (coprolites), pottery with food residues, animal bones, and tools used in food preparation. However, they cannot ascertain diet from unrelated artifacts such as fossilized firewood, which does not usually contain direct evidence of consumption and diet.
Analyzing ancient people's diet is done by investigating zooarchaeology remains, studying human skeletal and dental remains, analyzing artifacts, and examining ethnographic studies of contemporary hunter-gatherers, among other methods. These methods reveal information about the types of food consumed, as well as insight into the health, economics, and social aspects of ancient societies. However, tree ring data, weapons used by premodern armies, or remnants of medieval clothing are not direct indicators of dietary practices.