<classify> Ukunakekela ukulingana kwamandla empilo, ukuzijwayeza imikhuba emihle yokuphuza amanzi, kanye nokuqonda izici ezihlukahlukene zamaphilisi wamandla kungasiza abasubathi bathuthukise indlela abadlala ngayo futhi ithuthukise nenjabulo yabo emidlalweni.  <topic>: Sciencedistance runner 