Questions & Answers about Der Helm bietet Schutz.
Because Helm is a masculine noun in German. Its dictionary form is der Helm.
In this sentence, der Helm is also the subject, so it is in the nominative case. For a masculine noun in the nominative, the definite article is der.
So:
- der Helm = the helmet
You have to learn the gender together with the noun in German, so it is best to memorize der Helm, not just Helm.
Bietet is the 3rd person singular present tense form of the verb bieten.
The subject is der Helm, which is he/it in grammatical terms, so German uses the er/sie/es form of the verb:
- ich biete
- du bietest
- er/sie/es bietet
- wir bieten
- ihr bietet
- sie/Sie bieten
Since der Helm is singular, the correct form is bietet.