Answer:
What is the effect of immunity on the spread of disease?
Explanation:
It links both immunity and the spread of disease into a question that suggests an independent and dependment variable.
the answer your looking for is D
These hydrogen atoms can come together in nuclear processes called fusion, which is the process that powers the sun, and through fusion, heavier atoms such as carbon and nitrogen are produced. These in turn undergo fusion to make even heavier atoms, and it is such processes that created all the atoms in the earth.
How do farmers contribute to water pollution?
One big reason is the chemicals that they used to be able to let their plant grow well. The water that they use in irrigation sometimes they uses chemicals to it. Farmers also throw chemical wastes to water without thinking the result of this.
