A) It enables the user to establish direct contact to the world of knowledge and information:
This characteristic refers to the fact that the internet provides users with access to a vast repository of information and knowledge from around the world. Users can connect to the internet to search for information, conduct research, access educational resources, and communicate with experts and peers. The internet serves as a global platform for sharing and disseminating knowledge and information.

(C) The internet is like a huge central warehouse of data:
The internet is often compared to a massive central repository of data because it contains an immense amount of digital information, including text, images, videos, documents, and more. This data is stored on servers and is accessible to users through various websites, online platforms, and databases. It's like a vast digital library where users can find information on a wide range of topics.

(D) It is increasingly used for e-commerce:
E-commerce refers to conducting commercial transactions, including buying and selling products or services, over the internet. With the growth of online businesses and digital marketplaces, the internet has become a significant platform for e-commerce activities. Users can shop online, make payments, and engage in various financial transactions over the internet. E-commerce has become a key aspect of the internet's functionality, enabling businesses and consumers to interact and trade online.

(B) It is only confined to urban areas:
This characteristic is incorrect. The internet is not confined to urban areas; it has expanded to cover both urban and rural areas worldwide. With advancements in technology and infrastructure development, internet access has become more widespread, reaching even remote and rural regions. 

So, the correct answer is indeed (2) (A), (C), (D).