Because a is the first letter in the alphabet
Write for your reader, not yourself.
Use pronouns when you can.
State your major point(s) first before going into details.
The coach brought the bag of team jerseys to the game
Answer:
It is a theory because it was developed with many new experiments, and it explained the observations.
Explanation:
A scientific theory is a term in science that serves as a description and explanation to the manifestation of occurrence of events. It involves fully assessed justification for a set of observations or empirical findings.
Hence, in this case, the correct answer is: "It is a theory because it was developed with many new experiments, and it explained the observations."