Answer:
Enzymes
Explanation:
The enzymes in the stomach protect it.
Different type of ways....
In 1922, the U.S.-driven Washington Naval Conference resulted in the Nine-Power Treaty reaffirming the Open Door principles. In reaction to the Mukden Incident of 1931 in Manchuria and the Second Sino-Japanese War between China and Japan in 1937, the United States intensified its support of the Open Door Policy.
Answer: the 1st one i think
Explanation:
