Match the following: part a1. engine that searches web pages in its database that contain specific words or phrases 2. service that connects you with a human librarian 3. engine that provides access to academic information for research 4. offers the convenience of searching many sources from one web site 5. finds subjective content, such as comments, reviews, and opinionspart ba. metasearch engineb. social search toolc. online referenced. general searche. specialty search

1: General search, 2: Online reference, 3:Speciality Search, 4: Metasearch engine, 5: Social search tool.

Explanation:

General search engine are internet portals for searching numerous compiled resources for specific key words or phrases. examples are Google and Bing.

Online references are virtual  reference that connect you to professional librarian over the internet.

Specialty search engine searches special created database for particular subject and they are also refer to as topical search engines.

Metasearch engine this kind of search engine uses other search engine to provide his own result.

Social search tool provide  content that are social media related.