Which line must be perpendicular to ↔cf? ad ← → gi ← → be ← → hj ← →

 Line must be perpendicular to Line CF is Line GI .

Step-by-step explanation:

From the given picture, we are given three lines (AD , BE and CF) intersecting other two lines (QI and HJ).

We can see that Line AD and Line CF is making right angle with line GI>

Also, we know that the perpendicular lines intersect at right angles to each other.

Hence, the Line must be perpendicular to Line CF is Line GI.

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun