The thallus of a mold consists of long, branched, threadlike filaments of cells called that form a tangled mass called a

Hyphae; mycelium.

Explanation:

Fungi can be defined as living microorganisms that are eukaryotic in nature and are able to reproduce using both means of reproduction i.e both asexually and sexually. Also, fungi do not have chlorophyll but are of great importance to the human world both scientifically and practically.

A thallus can be defined as the vegetative or bodily structure of fungi. Thus, the various forms of fungi are;

I. Yeast.

II. Mushroom.

III. Mold.

A mold is typically multicellular (has more than one cell) and filamentous in nature. The thallus of a mold consists of long, branched, threadlike filaments of cells called hyphae that form a tangled mass called a mycelium.

the answer is d. chordata