What does it mean to be a sad ?

Explanation:

To enter a stage of negativness

I'm trying to reach a new rank so I'd appreciate you marking me as brainliest. If you don't want to it's okay, have a nice day.

See below:

Explanation:

Although this is a very varying question, scientifically, being sad is when a hormone called serotonin is altered. Being sad is not a good feeling. It is a feeling of being low, not in the mood for laughter and joy, and overall being irritable and unhappy. Often times people are sad for reasons that cause sadness, like the loss of a loved one or an argument with a friend.

the answer would be   10%

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.