Because they are different.
Without any apparent reason or for no apparent reason simply means that there is no clear explanation or cause for something to occur or happen. It signifies that the cause or rationale behind a certain event or action is not immediately evident or obvious.
When the people responsible for price of oil raise it for no apparent reason.
Yes, humans need to stop encroaching on their habitat. The reason they are "threatened" is because of human activity - there are too many people on the world.
yes they are, but mainly when you provoke them or go near or into their territory without knowing. sometimes, the cobras bite for no apparent reason. that may seem weird but the main reason they bite is when they are out for prey and they don't realise what they striked and the other reason is that they bite when they think they are threatened.
Traumatic or upsetting events, though people with an anxiety disorder may have anxiety attacks for no apparent reason.
Cats may bite without apparent reason due to feeling threatened, in pain, or overstimulated. It could also be a form of communication or play behavior. Understanding your cat's body language and behavior cues can help prevent future bites.
to pleasure vagina
Trident was used for no apparent reason
Don't know if you noticed, but you just asked the reason for a person blacking out for no apparent reason, lol I'd consult a doctor.
yes
Being overly friendly with someone for no apparent reason.
Extreme happiness and excitement for no apparent reason.