How does Joy Kogawa use imagery in Obasan?

Examples of Imagery:

“Where do any of us come from in this cold country? Oh Canada, whether you admitted it or not, we come from you we come from you. From the same soil, the slugs and slime and bogs and twigs and roots. We come from the country that plucks its people out like weeds and flings them into the roadside. We grow in ditches and sloughs, untended and spindly. We erupt in the valleys and mountainsides, in small towns and back alleys, sprouting upside-down on the prairies, our hair wild as spiders' legs, our feet rooted nowhere. We grow where we are not seen, we flourish where we are not heard, the thick undergrowth of an unlikely planting. Where do we come from Obasan? We come from cemetaries full of skeletons with wild roses in their grinning teeth. We come from our untold tales that wait for their telling. We come from Canada, this land that is like every land, filled with the wise, the fearful, the compassionate, the corrupt.”

“Elsewhere, people like Aunt Emily clack away at their typewriters, spreading words like buckshot, aiming at the shadow in the sky.”