The scientifically accepted age of earth is

a. 4.28 billion years.
b. 4.54 billion years.
c. 4.03 billion years.
d. 4 billion years.

B. 4.54 billion years would be the correct answer.

the answer to you question is   jet streams

the answer is admiramos

the rule for verbs is whoever you are referring to (in this case 'nosotros'), you need to change the ending of the word.

nosotros - amos

yo - o

tu - as

el, ella, usted - a

ellos, ellas, ustedes - an

(examples: nosotros bailamos (instead of bailar) or yo hablo (instead of habla)