Final answer:
Thailand was considered a developing country in the 1970s due to limited technology, infrastructure, and social challenges. However, it was able to change by focusing on economic development and attracting foreign investments.
Step-by-step explanation:
Thailand can be described as a developing country in the 1970s due to several factors. Firstly, it had limited technological advancements and infrastructure compared to developed nations, which impacted its economic growth. Additionally, Thailand faced challenges such as high birth rates, limited education opportunities, and inadequate healthcare. However, Thailand was able to change by focusing on economic development, attracting foreign investments, and promoting industries such as manufacturing and tourism.