They could only request troops and soldiers because they didnt have an army, hope that helped :))
A barter is negotiating the trade of one good to another. this is easier with coins because is has the same worth for everyone, whereas if goods were being negotiated, it would be more difficult because the worth may vary from person to person.
Answer:
The skin sensors
Explanation:
The skin sensors are in the cutaneous and subcutaneous tissues. Inside them, there are various nerves and receptors that can be divided in three groups: mechanoreceptors, nociceptors and thermoceptors. The thermoceptors are the receptors that specify in the acknowledgement of different types of temperatures such as hot and cold. If we touch something with high temperatures (hot or cold) those are the sensors that send the message to our brain.