Challenge that stand in way of sending explorers to the center of the earth?

The coco river is a natural border between nicaragua and which other country

[fw.02]diana is studying four surface features of florida. she classifies the surface features and places them in different columns of a chart as shown below. surface features column 1 column 2 hot springs sinkholes caverns geysers which of these titles best represents column 1 of diana's chart? formed by freezing groundwater o formed by heating groundwater o formed by evaporation of groundwater o formed by chemical action of groundwater

In the figure, polygon abcd is transformed to create polygon a′b′c′d′. this transformation is a by a factor of .