How does a rain shadow affect the weather?

A rainshadow occurs when prevailing winds carry moisture from the ocean, eastward over dry land, dropping precipitation on the windward side of a mountain range. Clouds are forced to rise over the range, causing the air to cool and drop its moisture.

A rain shadow is a patch of land that has been forced to become a desert because mountain ranges blocked all plant-growing, rainy weather. On one side of the mountain, wet weather systems drop rain and snow. ... Cool air forms clouds, which drop rain and snow, as it rises up a mountain.

option a is correct i.e.

only sodium ions can pass through the membrane.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

Size and shape of continents