एक जीवविज्ञानी ने एक खलिहान में चूहों की समष्टि (आबादी) का अध्ययन किया। उसने पाया कि औसत जन्मदर (natality) 250, औसत मृत्युदर (mortality) 240, आप्रवासन (immigration) 20 और उत्प्रवासन (emigration) 30 था। समष्टि में शुद्ध वृद्धि कितनी है?

Choose the correct statements regarding population interactions between two species. A. In both parasitism and commensalism, only one species benefits and the other species is harmed. B. Both species benefit in mutualism. C. Both species benefit in commensalism. D. In parasitism, only one species benefits and the other species is harmed. E. In amensalism, one species is harmed and the other is unaffected. Choose the correct answer from the options given below:

Which of the following equations depicts Verhulst-Pearl logistic population growth?