I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it.
A. cutting down or burning of all the trees in a forested area
Answer: it can help you (if you observe well) 1) to get to know yourself better, 2) recognize relating patterns adquired from your own family, 3) leave infantile approach to relationships (we all have tendency to look for someone who will unconditionally satisfy our needs and our ego requirements) and learn to relate as adult (respecting, i.e. respect frontiers of the other and require respect, i.e. learn the other respect your boundaries), 4) leave childish, infantile dependency and become responsible for the kind of relationships we make.
Explanation: in our psyche there is always something what is called "kinship libido" that seduces us again and again to regress, to depend on parenting figures. That is why it is no easy to leave family of origin (leave not only physically but also psychologically).
<span>A. replacing private ownership with common ownership
</span>After World War II, Mao Zedong believed that improvements in farm production could be achieved only by replacing private ownership with common ownership.
NOT:
<span>B. conquering the island of Taiwan
C. replacing common ownership with private ownership
D. sharing power with the Nationalist party</span>
