Identify the unclear pronoun references in the following paragraph. Where necessary, rewrite the sentences so that all pronoun references are clear: —

Travelling is a part of education. These means going from place to placE- One can enhance knowledge by going from place to placE- These gives one the opportunity to see the unseen and know the unknown. Some people are averse to travelling. This limits his vision. However, by travelling to different parts of the world, my knowledge can be enriched.