We are proud because Buddha was born here. We are proud because of our Natural Heritage. We are proud of the highest peaks and the lowest valleys.
We are recognized as the country of the highest mountain in the world. So, Sagarmatha is the national pride of Nepal.
<em>Answer:</em>
<em>fixed-interval </em>
<em>Explanation:</em>
<em>Fixed-interval schedule</em><em> is considered as one of the four distinct types of reinforcement schedule in the </em><em>operant conditioning theory </em><em>which was introduced by</em><em> B. F. Skinner.</em><em> A fixed-interval schedule is referred to as a reinforcement schedule whereby the very first or initial response is being rewarded once a 'specified time amount' has been passed or elapsed.</em>
<em>In this case, Colin's behavior is reinforced on a fixed-interval schedule.</em>
