Jawaban:

1. Why do people study English?

English is the language that is mostly spoken in the world, it's known to be the international language to connect and socialize with a lot of people worldwide. Having a good understanding of English can help us to have more opportunities in life. This makes English one of the most useful languages to learn.  

2. The negative effects of the Internet?

The internet is a large area of a network that connects devices in this world. It has made a significant difference in our lives. People mostly use it to communicate with each other, gather information, create business opportunities, etc. Besides the positives, it also has some negative impacts. A few examples are long-term eye vision problems (if we stare at our phone/pc/laptop excessively), the possibility of harmful actions such as cyberbullying, which tends to lead to depression, as well as the excessive use of our devices that could lead to several health problems.

3. The positive effects of green schools?

Green schools are designed to educate the students about the environment and nature. It has a purpose to lead the world towards a healthier and more sustainable future.  (I apologize if the information is not detailed enough, I haven't done any research related to this)

4. Why the flag ceremony is important for Indonesian students?

As far as I know, the flag ceremony is extremely important to commemorate our hero's that have struggled to fight for Independence back then (It's a way to respect them). That's why we have to be respectful when we attend the ceremony.

Penjelasan:

I'm just a middle school student trying to help you out, so please forgive me if there are mistakes in any of these sentences :)

peace out!