According to https://geology.com/records/bathyscaphe-trieste.shtml
It was Don Walsh and Jacques Piccard who descend into Challenger Deep in the Bathyscaph Trieste.
Nitrogen fixing bacteria.
It would be considered E
Since
Parasitism is when one be benifits at the others harm, normally has a host and parasite. Like a tic and dog. The tic is the parasite and the dog is the host
Competition is when two animals fight for prey, territory, or mates. Like when two male lions fight to prove strength and the winner leads the pack while the other is kicked out and must go find there own pack
Mutualism is is when two animals are counted as mutuals. Like the alpha male and female that believe they are equals
Predation is when one animal eats another it normally has a prey and a predator Like the cat and the mouse. The mouse is the prey and the cat is the predator
Commensalism two animals live peacefully in the same habitat. Like the cow and the cowbird both love in harmony
In the periodic table, the atomic radius of the atoms decrease from left to right. This means that Carbon is smaller than Boron. So from the choices you can rule out the first and third choice.
Now, the reason why Carbon is smaller than Boron is because Boron has more protons and as the protons increase it attracts the electrons closer, which makes the atom smaller.
Carbon has more protons, so it exerts a greater pull. The answer is then Option 2: Boron has a larger radius and the protons in carbon exert a greater pull.
As for the second question, a compound is defined as a substance that is made up of two DIFFERENT elements that are chemically bonded. If you look at the second option, it is a compound. It is made up of hydrogen and oxygen atoms.
The answer is then option 2.
