Question

question 3
which can be estimated from studying the closure of the sutures of the skull?
racial ancestry
height
age
sex

question 4
which can often be determined from studying the structure of the hip and pelvis bones?
racial ancestry
country of origin
skin color
sex

Explanation:

For Question 3, the closure of skull sutures is related to the aging process and can be used to estimate age. For Question 4, the structure of the hip and pelvis bones has distinct differences between males and females, which can be used to determine sex.

Answer:

Question 3: age
Question 4: sex