Question

read the text. snowflakes are formed by water droplets freezing onto bits of dust in the atmosphere, but they come in many different shapes. the most well - known is the six - pointed, star - like snowflake, paper versions of which can be found in the windows of many classrooms. but some snowflakes are simple six - sided disks, and others are tiny six - sided columns. two main factors determine the shape of an individual snowflake crystal: the temperature and level of moisture in the air. colder temperatures, below - 22°c (- 7.6°f), produce simple disks and columns. the familiar star - shaped crystals form in warmer temperatures. and moister air gives rise to more complex shapes with more branches and details. which organizational structure does this text primarily use? problem - solution compare - contrast cause - effect

Explanation:

The text explains that the shape of snowflake crystals is determined by two main factors: temperature and moisture in the air. It then describes how different temperatures (colder vs. warmer) and moisture levels (moister air) cause different snowflake shapes (simple disks/columns, star - shaped, more complex shapes). This shows a cause - effect relationship where the causes (temperature, moisture) lead to the effects (different snowflake shapes). The problem - solution structure is not used as there's no problem being solved, and the compare - contrast structure is not the primary one as the main focus is on the causes of snowflake shape differences rather than just comparing the shapes.

Answer:

cause - effect