You are comparing different memory management strategies, not languages features. All of those languages (C, Zig, C++ and Rust) give you enough choices when it comes to memory management.

You can decide to not use frequent heap allocations in Rust or C++ just as you can in Zig (it means not using large areas of the C++ or Rust standard libraries, while Zig definitely has the better approach when it comes to allocations in the standard library, but these are stdlib features, not language features).