Most likely caused by fears he’s scared she’s going to be more important than him and he’s jealous
The one that you've circled (A) is the correct answer.
Life style, environment toxins, and Gene mutations
The correct answer is C.
If siblings explained the use of technology and media to each other the outcome expected would be that the siblings would spend time using technology tools together. They would each know how to use the media and technology, they would probably use them at the same time, they might game together, they would interact together and help each other out.
