die Entwicklung
development
A process of gradual change, growth, or progress over a longer period of time.
Die Entwicklung eines Kindes in den ersten Lebensjahren ist faszinierend.
A child's development in the first years of life is fascinating.

development
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development
A process of gradual change, growth, or progress over a longer period of time.
Die Entwicklung eines Kindes in den ersten Lebensjahren ist faszinierend.
A child's development in the first years of life is fascinating.

'Die Entwicklung' (development) is the noun for the verb '(sich) entwickeln' (to develop). The noun describes the process or result of the action of the verb.
Ein Schmetterling entwickelt sich aus einer Raupe.
A butterfly develops from a caterpillar.
To describe a process of change, the structure 'die Entwicklung von ... zu ...' (the development from ... to ...) is often used. It shows the starting point and endpoint of the change.
Wir beobachten die Entwicklung von einer kleinen Idee zu einem großen Projekt.
We are observing the development from a small idea into a large project.
In business and technical contexts, the combination 'Forschung und Entwicklung' (research and development, often abbreviated as 'F&E') is a very common fixed expression.
Die Firma steckt viel Geld in Forschung und Entwicklung.
The company puts a lot of money into research and development.
When referring to news or current events, the plural form 'die Entwicklungen' is almost always used. Typical verbs in this context are 'verfolgen' (to follow) or 'beobachten' (to observe).
Ich verfolge die aktuellen Entwicklungen in der Politik sehr genau.
I follow current developments in politics very closely.
training / education
'die Entwicklung' and 'die Ausbildung' can both describe a process in which something emerges or improves. However, 'Entwicklung' is much more general: it is about change, growth, or progress over a certain period of time. 'Ausbildung' usually means that someone is learning a profession. In some contexts, 'Ausbildung' can also mean the formation of a shape or quality. Learners may confuse the words because both have to do with a process. When it is about learning a profession, 'Ausbildung' is natural. When it is generally about change or progress, 'Entwicklung' fits better.

In der E-Mail beschreibt Frau Demir die Entwicklung des Projekts seit Montag.
In the email, Ms. Demir describes the development of the project since Monday.
Nach der Schule beginnt Mehmet eine Ausbildung als Koch.
After school, Mehmet begins vocational training as a cook.