Earth's atmosphere and oceans were largely formed by ... A- crystallization from magma B- outgassing from volcanos and condensation C- biologic processes of organisms D- capture from space by Earth's gavitational field

The correct answer is B- outgassing from volcanos and condensation.

Here's a step-by-step explanation:

1. The Earth's atmosphere and oceans were not formed by crystallization from magma (option A). This process can form rocks and minerals, but not gases or liquids like those found in the atmosphere and oceans.

2. Outgassing from volcanos and condensation (option B) is the primary way the Earth's atmosphere and oceans were formed. Volcanic outgassing released water vapor, carbon dioxide, and other gases into the atmosphere. Over time, the water vapor condensed to form oceans.

3. While biologic processes of organisms (option C) have contributed to the composition of the atmosphere (for example, plants produce oxygen), they did not primarily form the atmosphere and oceans.

4. The Earth's gravitational field (option D) does capture some particles from space, but this process is not responsible for the large amounts of gases and water that make up the atmosphere and oceans.