The most grown crop in the US is corn, followed by soybeans and wheat.
This process is called refraction. It occurs because the mediums are different densities, so the light moves at a different speed and appears to bend.
Change to the landscape from construction. The answer is c because if there is construction, they are probably building something on top of what used to be that ecosystem.
Answer: Acetylcholine.
Explanation: Acetylcholine is a neurotransmitter that mediates many sinaptic functions in nervous system. When a motor neuron releases acetylcholine at the neuromuscular junction, it binds to nicotinic receptors in muscular fibers and activates a signal cascade that will free intracellular calcium ions, causing the contraction of the muscular fibers.
