What kind of harmony uses only notes from the key signature

The dynamics of a musical piece refer to the a. key signature b. composer’s history c. volume changes d. instrumentation

The caves at lascaux were closed in 1963 because a. vandals were destroying the paintings b. the collective breath of the many visitors caused the paintings to corrode c. the weather was destroying the paintings d. the government of france wanted scholars to be able to study the work without distraction

Name this famous relief sculpture and the time period it is from. describe what is happening in the sculpture. is this sculpture characteristic of the time period which was created in?