curriculum/challenges/english/blocks/learn-how-to-talk-about-numbers-with-a-coworker/684800844d920d46cb3a8b82.md
Listen to the audio and complete the sentence below.
Specifically, one-fourth of this portion is directed towards BLANK development, which is crucial given our BLANK goals.
back-end
This refers to the part of the system that handles data, servers, and logic. This is a compound word, remember to use -.
scalability
This word describes how easily a system can grow or handle more work as demand increases.
Back-end refers to the server-side part of software — the part that manages data, logic, and processes behind the scenes. In the dialogue, it acts as a compound adjective and uses -. Another example:
She's working on the back-end code today. — She is writing or fixing the part of the code that runs behind the scenes.
Scalability means how well a system can handle growth, such as more users or larger amounts of data. For example:
They tested the system's scalability under high traffic. — They checked if the system works well when many people use it.
In the sentence, Alice is explaining that back-end is essential to support growth, which is why it's a key budget area.
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