Respuesta:
Here are the sentences with the correct tilde placement:
a) El joven **ítalo**-francés llegó con sus primos a mi tierra.
b) Me siento **cómodo** y feliz cuando la gente **también** lo está.
c) Este día celebramos un **sinfin** de buenas noticias.
d) Originalmente se pensó en regalar valores por **doquier**.
Here's a breakdown of the changes made:
* **ítalo**: This word is an adjective that describes someone who is Italian and French. The tilde is placed over the "i" to indicate that the stress falls on that syllable.
* **cómodo**: This word means "comfortable" in Spanish. The tilde is placed over the "o" to indicate that the stress falls on that syllable.
* **también**: This word means "also" in Spanish. The tilde is placed over the "a" to indicate that the stress falls on that syllable.
* **sinfin**: This word means "endless" in Spanish. The tilde is placed over the "i" to indicate that the stress falls on that syllable.
* **doquier**: This word is an adverb that means "everywhere" in Spanish. The tilde is placed over the "u" to indicate that the stress falls on that syllable.
I hope this helps!