Most phobias start in childhood, but they can also develop in adults.
Explanation:
In the given sentence, a comma between the noun <em>childhood </em>and conjunction <em>but</em> is necessary.
This is a compound sentence. A compound sentence is a sentence that consists of at least two independent clauses joined by a comma, semicolon, or conjunction. When we use a conjunction to connect two independent clauses, it should be preceded by a comma. That's why the original sentence is incorrect.
Correct me if i’m wrong but the insect is accelerating based on the car if the car wasn’t there, there wouldn’t be any acceleration happening within the insect.