Answer:
a. By Calculating magnetic reversals.
Explanation:
They determine the age of the ocean floor by examining magnetic fields in the planet Earth.
B, C, D, B
I hope these are right, hope this helped.
This is because elements are pure substances with only one atom. When two or more elements are combined, you get compound elements; which allows for more substances to be created.
The food chain that would include an aphid include:
- Plant ---> Aphid ----> Birds
- Plant ---> Aphid ----> Spiders
- Plant ---> Aphid ----> Bat
<h3>What is a food chain?</h3>
A food chain is a chart that shows how food is transferred from producers to consumers.
Producers are plants as they are responsible for producing food from inorganic materials using the Sun's energy.
Consumers depend on plants and other organisms.
The food chain that would include an aphid include:
- Plant ---> Aphid ----> Birds
- Plant ---> Aphid ----> Spiders
- Plant ---> Aphid ----> Bat
Learn more about food chain at: brainly.com/question/19066362
