Which element in magma is most abundant

In magma, oxygen is the most abundant element.

The answer is Oxygen

Explanation:

Magma is composed of a mixture of molten materials with varying amounts of dissolved gases and small amounts of solid materials such as crystals and rock fragments. Magma originates in the deep areas of the interior of the earth between the upper mantle and the crust, so it can be known that the main components of magmas are the most common elements of that area, where eight elements form between 98 and 99% of the total mass of the earth's crust and almost half of it is oxygen. Oxygen comprises 46.6% of the composition of magma.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.