Kayak is a company that allows customers to efficiently search databases to find the best airline and hotel deals all over the Web. Kayak does not make bookings but rather provides recommendations for the best travel plans. Travel providers pay Kayak a commission when customers click through to their sites. Kayak, travelers, the airlines, and the hotels are all part of .a. facilitating agency
b. marketing mix intermediary
c. selective promotion channel
d. marketing channel or channel of distribution
e. transportation channel or channel of movement

(D) Marketing channel or channel of distribution

Explanation:    

 The marketing channel is one of the type of organization that perform various types of activities for purpose of transmission of the products and the services from the manufacturer to the customer or the end user.

It is also known as the distribution channel and it include the various types of business strategies for promoting the product.

According to the given question, the Kayak is one of the type of organization that publicly allow their database for the purpose of searching the best deals for the hotels or airline.

Therefore, The kayak is one of the part of marketing channel or the channel of distribution.    

explanation: i am going to tell you a lie dont know i just wanted to answer lol

answer; /// the above statement is (true);