ldc-crm/app/Models/Answer.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Answer extends Model
{
    use HasFactory;

    protected $fillable = [
        'answer'
    ];

    /**
     * Question BelongsTo relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function question()
    {
        return $this->belongsTo(Question::class);
    }

    /**
     * Answer belongsToMany relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function customers()
    {
        return $this->belongsToMany(Customer::class, 'customer_answer');
    }
}