Answer:
I think it is the first one
Explanation:
The ribbon is a set of toolbars at the top of the window in Office programs designed to help you quickly find the commands that you need to complete a task. Sometimes the ribbon can get hidden and it's hard to find. The quickest way to show the ribbon is to click on any visible tab, like Home<span>, </span>Insert<span> or </span>Design<span>. You might also want to hide the ribbon to maximize screen space.</span>
The number of accelerometers that are in an IRS system are three (3).
<h3>What is an
IRS system?</h3>
IRS system is an abbreviation for inertial reference system (IRS) and it can be defined as a navigation system that is designed and developed to provide inertial navigation data to various user systems, especially by using a ring-laser gyro.
In the Aviation and Engineering filed, he number of accelerometers that are in an inertial reference system (IRS) system are three (3).
Read more on navigation system here: brainly.com/question/26052911
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<span>TRUNK. In a dendritic system, there are many smaller rivers or streams (the "twigs" of the tree), which are then merged into the tributaries of the main river (the branches and the trunk of the tree, respectively). They tend to develop in V-shaped valleys</span>
