which of the following is a power of the legislative power
is it establish lower federal ourts
No.
Do you now what legislative power means?
Established by Article I of the Constitution, the Legislative Branch consists of the House of Representatives and the Senate, which together form the United States Congress. The Constitution grants Congress the sole authority to enact legislation and declare war, the right to confirm or reject many Presidential appointments, and substantial investigative powers.
from whitehouse.gov
The legislative power refers to the authority that is responsible for making laws. It is typically vested in a legislative body, such as a parliament or congress.
To determine if establishing lower federal courts is a power of the legislative power, you would consult the founding document of the governing body, such as a constitution or legislative act.
For example, in the United States, the Constitution grants the legislative power to Congress. According to Article III of the U.S. Constitution, the power to establish lower federal courts is indeed granted to Congress. This means that establishing lower federal courts is a power within the legislative power in the United States.
To answer your question, yes, establishing lower federal courts is a power of the legislative power in certain jurisdictions, such as the United States.