Question

とまと

()でくくってある部分の和訳が出来ないので、svocなど、どう読めばいいのか教えてください😭

pack ice is already diminishing every summer and without pack ice I cannot see how the
bears would survive. They are not adapted for living on land," he said. 4The bears live
almost entirely on floating ice that packs together to create vast expanses separated by
small areas of open water that they swim across. They are superbly adapted for survival
in the frozen north, eating mainly seals. They range across a huge area of ice controlled.