A
Explanation:
it’s the one that makes the most sense !

Last option: Preserve an ecosystem

• The establishment of a bird reservation is a way to preserve an ecosystem because reservation provides suitable environment to organism. A healthy ecosystem means large number of biodiversity.
Explanation:
The human erythrocyte adopts a distinctive biconcave disc form in vivo. ... It has been suggested that this shape maximises the surface area to volume ratio and thus expedites diffusion.
Answer:
Because they are the most destruction waves
Explanation:
Surface waves travel just below the earth’s surface. Examples of surface waves are Rayleighs and Long waves. Rayleighs cause ripples on the ground while long waves move the ground horizontally perpendicular to the direction of travel of the wave. Therefore, these waves are capable of destroying the foundations of structures and hence causing their collapse. Studying these waves allow these professionals to design foundations strong enough to withstand these waves.
<h2>Answer:</h2>
Scientists can determine the order of when rocks formed on Earth.
<h2>
Explanation:</h2>
Radioactive dating is the technique in which scientists used radioactive material like carbon or uranium to date the materials. This method of dating is based on the known decay rate of the isotopes of an element. Uranium, Carbon, and potassium are few examples of elements commonly used in radioactive dating.