Question

Collocations sound "right" to native English speakers because they​

Answer 1

Collocations are a brilliant way to sound like a native speaker.

To be honest I feel it simply sounds more professional when we use collocations in a sentence.
In a way it also conveys the message (that is our sentences) in a more vivid manner and by itself seems complete.

Answer 2

Are often used' is the answer.

About collocations:

• Collocation means the usage of two or more words together.
• That is people use two or more words joined often and use them commonly and casually.
• Sometimes, the colocations may not be right, still it is practised by people because they use them regularly and find no mistake in these at all.
• Moreover collocations come to practice when the native speakers speak them.
• For example, it must be 'heavy rainfall'. But now a days we see collocations like 'strong rainfall' readily accepted.
• Therefore collocations sound "right" to native English speakers because they are often used.