Hey there!
Consider what each of your terms mean:
Physical Capital: Man made products like computers, machinery, and other goods that make certain production processes possible and run smoothly
Human Capital: Labor and other resources that humans can provide, like education, skills, and other trades that can improve the production process
Engaging in International Trade: Companies carrying out tasks or steps to encourage trade of goods with other countries/territories
Considering those definitions, I would say your answers are:
Increase in literacy rate → Human Capital
Increase in foreign demand for goods → Engaging in International Trade
Increase in production speed and quality → Physical Capital
Hope this helped you out! :-)