Questions

To Confucius, Five Relationships were inportant : between ruler and subject

father and son

husband and wife

older brother and younger brother

older friend and younger friend

From the given conditions ,

only A = 27 yrs satisfies.

Giraffe has the highest blood pressure among animals. 

This is due to the fact that there is a large pressure drop (~100 mmhg) as the blood is transported from the heart, up the neck, to the brain. This is about twice the normal blood pressure of humans (120/80 mmhg).

(a) refers to political importance and (b) to economic importance. Out of (c) and (d), (c) is more important.

The US Congress consists of two bodies 

a) the Senate and   b) the House of Representatives. The Senate, composed of 100 members (two Senators from each State), is a powerful body and exercises a very real influence in national affairs.

Grasslands are found in most ecoregions of the Earth.

For example, there are five terrestrial ecoregion classifications of the temperate grasslands, savannas, and shrublands ecosystem, which is one of eight terrestrial ecozones of the Earth's surface.