Which of the following is an example of parasitism: question 3 options: two males lions fighting for dominance of a pride. a goby fish warning a shrimp about danger so that they both retreat to the burrow the shrimp maintains. a roundworm living inside a dog and producing eggs which then get distributed to the environment through the dog's feces. a fox hunting and eating a rabbit for food

A roundworm living inside a dog and producing eggs which then get distributed to the environment through the dog's feces.

Explanation:

Parasitism is said to be an interaction between two organism whereby one organism benefit from the relationship and the other organism suffers. Most times the organism that suffers do not die instantly.

In the case of roundworm living inside a dog and producing eggs , the dog provides the necessary environment for the roundworm to strife. The roundworm enjoys the ingested foods from the dog and also comfortable environment devoid of predators. Even when the roundworm lay eggs the dog assist in the growth of the next generation by releasing it to the environment through feces. other animals later ingest the developed egg and the cycle continues.    

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.