Mexico and the united states have strained border relations mainly due to the following factor:
question 7 options:

wood carving remains today the primary sculptural art form of the sub saharan continent. african art history shows the earliest wooden sculptures from the 17th c are attributed to the kuba, central zaire but the earliest surviving sub-saharan sculpture is a zoomorphic head found in 1928 in central angola.

i hope this .

answer; ///i believe that the correct answer is (a) the great depression