Which best explains the reason for daily high and low tides? a. warm, less-dense water rises, moving cold dense water toward the shore. b. volcanic activity on the ocean floor causes water to swell. c. the moon's gravitational pull on earth causes water to bulge on two sides of the earth. d. earth is tilted on an axis, causing water to spread unevenly across the planet.

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2