Early submersibles were dangerous and could remain underwater for only a few hours at a time. How did Robert Ballard solve this problem? * 1 point
A. He joined millionaire Jack Grimm’s team in its quest to find the Titanic.
B. He borrowed sonar equipment from the U. S. Navy.
C. He read survivors’ stories about the night the Titanic sank.
D. He designed a remote-controlled submersible.

Oceans produce approximately 80 percent of the oxygen our planet needs to support animal life. pollution that reaches the ocean through dumping, oil leaks, runoff, and other processes interferes with that oxygen production and poses a real threat to the oxygen content in our atmosphere. if the oxygen content decreases, it is likely that carbon dioxide will increase. this could have dramatic consequences for life as we know it. which does this passage indicate causes a decrease of oxygen in the atmosphere?

Which best describes the underlined words in the sentence? the ancient babylonians, egyptians, and chinese developed calendars based on the movements of the sun, moon, planets, and stars. a. simple subject b. compound subject c. complete subject

What is a common symbol of love and commitment?