The interest of u.s is because, u.s wanted stop the terrorists and communist
Answer:
Sensitive Period.
Explanation:
Some researchers in developmental psychology and biology, consider the critical period in a child’s development to consist of two sub-periods: <em>'strong critical period'</em> and <em>'weak critical period'</em>.
The latter is referred to as a <em>sensitive period</em>. During this period child learns such skills as <u>grammar processing, vocabulary acquisition, and sports training. Skills acquired during this period can be also further improved at later stages of development</u>.
When South Vietnam was in danger, Johnson initially sent the Marines and paratroopers to protect the American installations. Some advisers, like Undersecretary of the State George Ball and McNamara recommended to the president to "expand promptly and substantially" the U.S. military in South Vietnam. Since Johnson didn't want to lose Vietnam to the communists, he decided to accept McNamara's recommendation which led to a massive escalation of the war. If they went for the negotiation and see hesitations of the communists to negotiate may only mean that they are nearing victory in South Vietnam.
