C-sections instead of natural delivery
Matter is all the “stuff” that exists in the universe. It has both mass and volume. Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Volume measures the amount of space that a substance or an object takes up.
The answer is B.
An ecosystem is community plus nonliving components in an area.
An ecosystem includes both biotic and abiotic factors of an area that organisms interact with. Examples of abiotic factors would be soil, water, sunlight etc.
Blood cancer can be in that blank space or maybe a chromosome bursting.
