These are the ones along the path

"These people are the seeds that fall along the path" or "These people are like seeds that fall along a path." In verse 14, what the sower sows is "the word." Here Jesus speaks of what the sower sows as those who hear the word. (See: rc://en/ta/man/translate/figs-metonymy and rc://en/ta/man/translate/figs-metaphor)

When they hear

"When they hear the word"