Sodium (Na) is a Alkali metal so that's the answer
<span>The Climate Friendly Farming Project was designed to provide funding for long term research into the sustainability and adaptability of agricultural systems(wheat, vegetables, and dairy systems) as increasing greenhouse gases
propagate and decline the efficiency of current agricultural practice.</span>
It is an example of rolling friction because balls roll.
Answer is ROLLING
The sun emits electromagnetic radiation so I think they are electromagnetic waves.