This is the 451st most frequent Japanese word.
発展
Development or growth.
In this sentence, '発展' is used to mean 'advancement' or 'progress' in the context of technological growth.
科学技術の発展により、私たちの生活は便利になりました。
With the advancement of technology, our lives have become more convenient.
This usage of '発展' signifies 'urban development' or the growth of cities.
都市の発展が環境問題を引き起こしている。
The development of urban areas is causing environmental problems.
Here, '発展' refers to the 'development' or 'evolution' of a discussion or idea exchange.