NEED GOOD ANSWERS

Reread lines 87-93. What is the author’s tone in this passage and what phrases convey this tone? Cite text evidence to support your answer.
"Our next big leap into
the unknown can be every bit as exciting and bold as our
pioneering work in space. It possesses the same “wow” factor:
alien worlds, dazzling technological feats and the mystery of
the unknown. The United States has the scientific muscle, the
diplomatic know-how and the entrepreneurial [2] spirit to lead
the world in exploring and protecting our ocean frontier.
Now we need the public demand and political will and
bravery to take the plunge in order to ensure that the oceans
can continue to provide life to future generations.
Today is a big step in that direction and hopefully it is just
the beginning."