Answer:
The correct answer is <u>B</u>: online atlas.
Explanation:
Atlas represents a collection of maps, which shows all the important geographic concepts on the Earth (continents, states, cities, rivers, mountains, lakes, etc...), so we use it to find different things, as for example the location of China.
An almanac represents a collection of important events of publications that took place or will take place in one year.
A dictionary represents a book that contains alphabetically listed words with their meanings, scopes of their use, synonyms, antonyms, etc.
Encyclopedia represents a book or a database which contains important information related to general knowledge or some important topics.