Yes, because it beings with a group of words that contains a subject and a verb.
To be alive, you have to have a purpose of living, you need the necessities of surviving: food, shelter, and clothing, and you need to be happy.
Some people do not have food, shelter, or clothing and they die of starvation, extreme weather, or even hydration.
Some people aren't happy and cannot find a purpose of living, so they commit die.
So if you're living, then you're alive. Being dead inside is basically you want to die and you have suicidal thoughts. That's not living.
To be alive, you live your life to the fullest and be the happiest you can be.
Answer: "if"
Explanation:
Signal words are referred to as the words that provide hints on what is expected to happen while one is reading.
The signal word that points to the problem in the passage is "if". From the text, we can see that Hughes knew that the meat that comes from a single cow could not make many people sick buy that the real danger was "if" the disease was passed to other cows.