1). Why did the Dutch build seaworks?

A: The Dutch built seaworks to hold back the sea and provide places to go for safety during floods and high tides.

2). Which regions have the harshest, coldest climates?

A: Eastern Europe, Finland, eastern parts of Poland, Slovakia, Hungary, Sweden, Norway, and Romania as well as the region of the Alps have the harshest, coldest climates.

All right.

To determine which regions have the harshest, coldest climates, you can refer to climate classification systems like the Köppen climate classification or look up information from reliable sources such as weather records or climate studies.

1. Köppen climate classification: The Köppen climate classification system categorizes climates based on temperature and precipitation patterns. The harshest, coldest climates are typically found in regions classified as either "D" (continental/subarctic) or "E" (polar/tundra). By looking at a world map with Köppen climate classification, you can identify regions that fall into these categories.

2. Weather records: Weather records can provide information on extreme temperature lows and annual average temperatures. You can search for historical weather data specific to different regions and compare temperatures to determine which regions experience the coldest climates.

3. Climate studies: Climate studies conducted by meteorological organizations or research institutions often examine temperature patterns across different regions. These studies may provide rankings or charts that highlight the regions with the coldest climates. Research papers, climate atlases, or online climate databases can be useful sources for this information.

When using any source, it's important to ensure that the information is reliable and up-to-date. Climate patterns can change over time, so it's always a good idea to consult multiple sources to obtain the most accurate and comprehensive understanding of which regions have the harshest, coldest climates.