Answer:
Nosotros tomamos agua purificada
Sergio baila tango
Tu tocas el piano
Explanation:
Remember in Spanish each pronoun as a specific ending for verbs.
Nosotors - ..mos: Tomar = toma + mos = tomamos
Sergio (el) - ...[remove the -r): bailar => baila
Tu - ...s: toca + s = tocas
Of course, you will find irregular verbs that may complicate things a little but they still follow a recognizable pattern.
Answer:
Each hemisphere cools down during the part of the year it's tilted away from the sun. The winter solstice (December in the north, June in the south) arrives at the time when that tilt is at its most extreme angle.