Answer:
b) temporal type.
Explanation: Elmo point or Elmo clusters are a form of chipped stones with triangular projection which are often used in northwestern United States of America between 4000 and 1500 years ago. This Elmo point is used used together with certain types of spears hunt for small mammals by the hunters during that period,Elmo point was first discovered in the year 1961 in Nevada United States of America.