What happens to trees from one life zone to the next? a.
All varieties of trees will increase as the altitude gets higher.
b.
A variety of trees will disappear as the altitude gets higher.
c.
Trees get larger as altitude increases.
d.
There is no difference in trees from one zone to another.

[B]

Relative location changes as maps and boundaries change.

Explanation:

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

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b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.