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The Sea Challenge

Across
the whole group of living and nonliving things that make up an environment and affect each other
a deep area of loose sand mixed with water into which heavy objects sink
a mischievous and often poor and raggedly clothed youngster
Down
Microscopic single-celled organisms lacking a distinct nucleus are known as bacteria. They may be shaped like spheres, rods, or spirals
substances that make land, water, air, etc., dirty and not safe or suitable to use