The answer is carbon dioxide.
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Answer:
All vascular plants have water-conducting tissue and are better adapted for life on land than the bryophytes; they are also characterized by a dominant sporophyte generation.
The temperature and salinity affect deep water current since
The water density depends on temperature and salinity . The deep currents from where the density of ocean water increases. The decrease of the temperature of water led to increase in water salinity while the density of water also increases.