Explain why the shape of animals is basically spherical whereas plants and fungi are filamentous

Plants and fungi are usually filamentous to increase the surface area in which they uptake their food, and this is advantageous as they raise their surface area for sunlight in photosynthesis.
Conversely, animals are usually round to reduce surface area for loss of water and heat. Unlike plant and fungi, most of their food intake is through the mouth hence not affected by surface area.

True, for example the gulf of mexico is surrounded by the us and spain& mexico.

Yes yes yes very good