Mohammed,
It looks like your last CSS, you have the text-align set to 'center'. If you are looking to have it full justified, you want it to look like this:
.major_data .about p:nth-child(2){
text-align: justify;
}
Basically, the available options for text-align are:
- Left
- Right
- Center
- Justify
Center is what you were using before, which is why your text was centered. Justify is the equivalent "full" in Word or something, which I believe is what you are looking for.