Really need with one 2. textiles and apparel are an industry that many countries tend to protect. underdeveloped countries, especially in asia, try to expand their textile industries to achieve development and economic growth.
why would lowered trade barriers on textiles around the world be to these countries? how might lowered trade barriers be harmful to them?

Lowered trade barriers will help the textile and apparel industry in under developed countries because there is more freedom for exchange of goods. Trade barriers hinders companies to export items to other countries or get imports from other countries so lowering it will allow more connection with other countries and will enable for the textile goods or finish products to be known to other countries and will also help allow the industry grow because more international clients will be accepted since it will be easier for them to export items with less hassle. It might be harmful because other people might exploit the industry that's why with lowered trade barriers arises more competitors. This will also allow smuggled good to be exported or imported with less security.