For aquatic ecosystems, these factors include light levels, water flow rate, temperature, dissolved oxygen, acidity (pH), salinity and depth. (Light level is an important factor in aquatic ecosystems.)
<span>It is an example of "puffing". Any person trying to sell a product or positively effect the opinion of something is expected to show some kind of bias towards the pros over the cons. As long as it does not include outright lies or no basis of fact.</span>
The correct answer to this open question is the following.
Although there are no options attached we can say the following.
Two ways in that presidents can control their approval with the public more directly are the use of mass media and social media to influence the public opinion of American citizens and the decisions he makes in favor of the American people that create direct benefits for them.
These methods affect their decision-making processes as head of the Executive branch in that sometimes the decisions made are only thought to improve their public image and popularity, not really resolving important issues in the country that need to be addressed seriously.
Many times, public relations and media advisors just think about how to favor the popularity of the US president, instead of inviting him to face the toughest issues that affect the citizens.
