Which of the following phase transitions is/are endothermic? 1. liquid water freezing to a solid at its normal freezing point of 0.0 °c.2. the sublimation of solid carbon dioxide into the gas phase.3. gaseous sulfur dioxide condensing into a liquid at its boiling point of –10.0 °c. a)1 only b)2 only c)3 only d)1 and 2 e)1, 2, and 3

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.