Visitors should prepare for a trip by bringing clothing for different types of weather
The entire second paragraph discusses how the different oceans/seas surrounding the park causes different weather. There can be dry air, blizzards, etc. which all cause a person to dress differently.
To maintain and renew your emotional energy, it's often best to eat well, exercise, and take breaks from work. Oftentimes when the body is happy the mind is happy, and vice versa.
Jonah has homework, but it isn’t finished i believe
Singular means one and plural means more than one