The sentence 'development has improved' is correct and usable in written English.
You can use it whenever you want to express that an improvement has been made in something. Example: Before the introduction of the new policies, development had been stagnant, but now it has improved significantly.
This is confirmed by the responses given by the participants whereby they felt that their professional development has improved after developing the e-portfolio.
The mood surrounding African economic development has improved greatly in the past few years.
The network development has improved the hypocenter locations quality but did not add significant effects on the detection capability because the stations distribution provided, already in the early 2000, an appropriate coverage of the area interested by 2000 2016 seismicity.
Beijing rejects this and says economic development has improved Tibetans' lives.
Earlier liquid cell TEM reactor yielded a spatial resolution of only 5nm, but recent development has improved the resolution to the sub-nanometer range[5].
Recent industrial development has improved living standards but due to insufficient environmental monitoring, the continuous discharge of massive industrial pollutants (organic compounds, trace metals, etc). is creating serious environmental problems.
Population health and economic development have improved significantly in many developing countries over the past three decades.
Stability and development have improved, and the economy is booming.
During Prime Minister Sheikh Hasina's two terms, the economy and social development have improved, according to most measures.
In recent years, the quality and availability of data on different aspects of development have improved, and this provides new opportunities for investigating the reasons behind the large differences in economic development.
"If you look at the last 20 to 30 years, we see that aggregate levels of development have improved".
