Question

We preferred to go by train because it was cheaper than bus travel.this is which parts of speech

Answer 1

Answer:

Conjunction

Explanation:

Here the use of because to join sentences, shows the usage of conjunction as a part of speech.

Answer 2

Answer:

Comparative degree of adjective

Explanation:

Here the cost of travelling by train is compared to cost of travelling by bus using the adjective 'cheap' in the comparative degree.