Which of the following has contributed the most to the increase of invasive species in europe? a. air pollution that has destroyed native plants b. desalination, which has killed native plants c. an increase in trade across the continent d. the lack of invasive species legislation in europe

Altocumulus, altostratus, cirrocumuls, cirrostratus, cirrus, cumulonimbus, cumulus, nimbostratus, stratocumulus, stratus 8.) clouds with tallest vertical development 9.) low altitude clouds in solid layers that produce rain 10.) high altitude thin flat layers of clouds 11.) rain clouds that form under stable atmospheric conditions 12.) middle altitude clouds with globular appearance