Title: वैकल्पिक

Text: A rigorous scientific approach to the function of behaviour will involve four stages: observation, hypotheses, predictions and test. The first two, observation and hypotheses, often go hand in hand. It may take many years getting to know a particular species before it is possible to ask good questions about its beahviour and ecology. Niko Tinbergen's work (1953) on the herring gull, Larus argentatus, was the result of over 20 years' painstaking observations of the bird's behavioural repertoire. प्रत्येक पराग्राफले परीक्षण हुनेछ।

Save test: यदि तपाईं यो टाइपिङ परीक्षणलाई साझा गर्न चाहानुहुन्छ भने यो प्रयोग गर्नुहोस् (केवल प्रमाणीकृत प्रयोगकर्ताहरूको लागि)।