According to Lechatelier’s principle, freezing of water is favoured at

${\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\rightleftharpoons {\mathrm{H}}_2\mathrm{O}\left(\mathrm{s}\right),\mathrm{\Delta H}=-\mathrm{Ve}$

$\therefore$ the process is exothermic, it is favourable at low temperature.

$\therefore {\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\mathrm{to}{\mathrm{H}}_2\mathrm{O}\left(\mathrm{s}\right)$ volume increases (density of ice is less than density of water), it is favoured at low pressure.