Kukhazikika kokhazikika kumatha kuzindikira kusamutsa kwamphamvu kwa maselo oyandikana nawo, kukwaniritsa kuchuluka kopitilira muyeso kwa 4A.Ukadaulo wapakali pano wofananira umatha kuwonetsetsa kuti batire imagwirizana kwambiri, kuwongolera mtunda wa batri, ndikuchedwetsa kukalamba kwa batire.
