Corrected sentence: Artificial satellites help forecast the weather, send communications, and do scientific research.
- Capitalization: Only the first word is capitalized: "Artificial". We do not write the whole sentence in capital letters.
- Article: We add "the" before "weather" to say which weather we mean: "the weather."
- Parallel verbs: The actions are all in the same form: "forecast," "send," and "do." This makes the sentence sound smooth and correct.
Great job! That sentence now reads clearly and correctly.