You are excavating a site in the Great Basin and you find a stratum that contains only Elko points. This indicates to you that the stratum dates to a particular period.
The Elko point, in this example, can be referred to as a:

a) functional type.
b) temporal type.
c) seriated type.
d) morphological type.

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.